42155425 has 24 divisors (see below), whose sum is σ = 56732480. Its totient is φ = 30888000.

The previous prime is 42155411. The next prime is 42155447. The reversal of 42155425 is 52455124.

It is not a de Polignac number, because 42155425 - 2¹⁹ = 41631137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42155393 and 42155402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48646 + ... + 49504.

Almost surely, 2^42155425 is an apocalyptic number.

It is an amenable number.

42155425 is a deficient number, since it is larger than the sum of its proper divisors (14577055).

42155425 is a wasteful number, since it uses less digits than its factorization.

42155425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1028 counting only the distinct ones).

The product of its digits is 8000, while the sum is 28.

The square root of 42155425 is about 6492.7209242351. The cubic root of 42155425 is about 348.0309155826.

The spelling of 42155425 in words is "forty-two million, one hundred fifty-five thousand, four hundred twenty-five".