43642425 has 24 divisors (see below), whose sum is σ = 74110336. Its totient is φ = 22645440.

The previous prime is 43642421. The next prime is 43642433. The reversal of 43642425 is 52424634.

It is not a de Polignac number, because 43642425 - 2² = 43642421 is a prime.

It is a super-2 number, since 2×43642425² = 3809322519761250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43642392 and 43642401.

It is not an unprimeable number, because it can be changed into a prime (43642421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5089 + ... + 10638.

Almost surely, 2^43642425 is an apocalyptic number.

It is an amenable number.

43642425 is a deficient number, since it is larger than the sum of its proper divisors (30467911).

43642425 is a wasteful number, since it uses less digits than its factorization.

43642425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15777 (or 15772 counting only the distinct ones).

The product of its digits is 23040, while the sum is 30.

The square root of 43642425 is about 6606.2413670710. The cubic root of 43642425 is about 352.0758945555.

The spelling of 43642425 in words is "forty-three million, six hundred forty-two thousand, four hundred twenty-five".