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102021200 = 2452255053
BaseRepresentation
bin1100001010010…
…11100001010000
321002222012202222
412011023201100
5202104134300
614042400212
72346110621
oct605134120
9232865688
10102021200
1152652046
122a200068
13181a0798
14d799a48
158e53785
hex614b850

102021200 has 30 divisors (see below), whose sum is σ = 245106894. Its totient is φ = 40808320.

The previous prime is 102021197. The next prime is 102021251. The reversal of 102021200 is 2120201.

It can be written as a sum of positive squares in 3 ways, for example, as 9784384 + 92236816 = 3128^2 + 9604^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127127 + ... + 127926.

Almost surely, 2102021200 is an apocalyptic number.

102021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021200 is an abundant number, since it is smaller than the sum of its proper divisors (143085694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102021200 is a wasteful number, since it uses less digits than its factorization.

102021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255071 (or 255060 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 102021200 is about 10100.5544402275. The cubic root of 102021200 is about 467.2652409752.

Adding to 102021200 its reverse (2120201), we get a palindrome (104141401).

Subtracting from 102021200 its reverse (2120201), we obtain a palindrome (99900999).

The spelling of 102021200 in words is "one hundred two million, twenty-one thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 255053 510106 1020212 1275265 2040424 2550530 4080848 5101060 6376325 10202120 12752650 20404240 25505300 51010600 102021200