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420872 = 2352609
BaseRepresentation
bin1100110110000001000
3210101022212
41212300020
5101431442
613004252
73402014
oct1466010
9711285
10420872
11268231
12183688
1311974a
14ad544
1584a82
hex66c08

420872 has 8 divisors (see below), whose sum is σ = 789150. Its totient is φ = 210432.

The previous prime is 420859. The next prime is 420899. The reversal of 420872 is 278024.

Added to its reverse (278024) it gives a square (698896 = 8362).

It can be written as a sum of positive squares in only one way, i.e., 256036 + 164836 = 506^2 + 406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26297 + ... + 26312.

2420872 is an apocalyptic number.

It is an amenable number.

420872 is a deficient number, since it is larger than the sum of its proper divisors (368278).

420872 is a wasteful number, since it uses less digits than its factorization.

420872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52615 (or 52611 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 420872 is about 648.7464836128. The cubic root of 420872 is about 74.9405157972.

Adding to 420872 its reverse (278024), we get a palindrome (698896).

The spelling of 420872 in words is "four hundred twenty thousand, eight hundred seventy-two".

Divisors: 1 2 4 8 52609 105218 210436 420872