421525442 has 16 divisors (see below), whose sum is σ = 682146360. Its totient is φ = 194201472.

The previous prime is 421525427. The next prime is 421525459. The reversal of 421525442 is 244525124.

It can be written as a sum of positive squares in 4 ways, for example, as 223532401 + 197993041 = 14951^2 + 14071^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548 + ... + 29040.

Almost surely, 2^421525442 is an apocalyptic number.

421525442 is a deficient number, since it is larger than the sum of its proper divisors (260620918).

421525442 is a wasteful number, since it uses less digits than its factorization.

421525442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29077.

The product of its digits is 12800, while the sum is 29.

The square root of 421525442 is about 20531.0847740688. The cubic root of 421525442 is about 749.7927972798.

The spelling of 421525442 in words is "four hundred twenty-one million, five hundred twenty-five thousand, four hundred forty-two".