100425402 has 108 divisors (see below), whose sum is σ = 278510778. Its totient is φ = 26056800.

The previous prime is 100425397. The next prime is 100425421. The reversal of 100425402 is 204524001.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 19263321 = 9009^2 + 4389^2 .

It is a super-2 number, since 2×100425402² = 20170522733723208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 106252 + ... + 107192.

Almost surely, 2^100425402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100425402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139255389).

100425402 is an abundant number, since it is smaller than the sum of its proper divisors (178085376).

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

100425402 is a wasteful number, since it uses less digits than its factorization.

100425402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 100425402 is about 10021.2475271295. The cubic root of 100425402 is about 464.8161326476.

Adding to 100425402 its reverse (204524001), we get a palindrome (304949403).

The spelling of 100425402 in words is "one hundred million, four hundred twenty-five thousand, four hundred two".