1020651200 has 84 divisors (see below), whose sum is σ = 2549191752. Its totient is φ = 402124800.

The previous prime is 1020651193. The next prime is 1020651209. The reversal of 1020651200 is 21560201.

It is a super-2 number, since 2×1020651200² = 2083457744122880000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020651209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102440 + ... + 111960.

Almost surely, 2^1020651200 is an apocalyptic number.

1020651200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020651200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274595876).

1020651200 is an abundant number, since it is smaller than the sum of its proper divisors (1528540552).

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

1020651200 is an equidigital number, since it uses as much as digits as its factorization.

1020651200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9610 (or 9595 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1020651200 is about 31947.6321501297. The cubic root of 1020651200 is about 1006.8368838274.

Subtracting from 1020651200 its reverse (21560201), we obtain a palindrome (999090999).

The spelling of 1020651200 in words is "one billion, twenty million, six hundred fifty-one thousand, two hundred".