642367425 has 48 divisors (see below), whose sum is σ = 1219044992. Its totient is φ = 292377600.

The previous prime is 642367421. The next prime is 642367433. The reversal of 642367425 is 524763246.

It is not a de Polignac number, because 642367425 - 2² = 642367421 is a prime.

It is a super-2 number, since 2×642367425² = 825271817402261250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642367421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123987 + ... + 129063.

Almost surely, 2^642367425 is an apocalyptic number.

It is an amenable number.

642367425 is a deficient number, since it is larger than the sum of its proper divisors (576677567).

642367425 is a wasteful number, since it uses less digits than its factorization.

642367425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338 (or 5333 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 642367425 is about 25344.9684355692. The cubic root of 642367425 is about 862.8351648452.

The spelling of 642367425 in words is "six hundred forty-two million, three hundred sixty-seven thousand, four hundred twenty-five".