125220402 has 24 divisors (see below), whose sum is σ = 287271036. Its totient is φ = 39284736.

The previous prime is 125220379. The next prime is 125220413. The reversal of 125220402 is 204022521.

It can be written as a sum of positive squares in 2 ways, for example, as 121022001 + 4198401 = 11001^2 + 2049^2 .

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 11 ways as a sum of consecutive naturals, for example, 204303 + ... + 204914.

Almost surely, 2^125220402 is an apocalyptic number.

125220402 is an abundant number, since it is smaller than the sum of its proper divisors (162050634).

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

125220402 is a wasteful number, since it uses less digits than its factorization.

125220402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409242 (or 409239 counting only the distinct ones).

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

The square root of 125220402 is about 11190.1922235500. The cubic root of 125220402 is about 500.2936967840.

Adding to 125220402 its reverse (204022521), we get a palindrome (329242923).

The spelling of 125220402 in words is "one hundred twenty-five million, two hundred twenty thousand, four hundred two".