42156465 has 32 divisors (see below), whose sum is σ = 74027520. Its totient is φ = 20357376.

The previous prime is 42156461. The next prime is 42156473. The reversal of 42156465 is 56465124.

It is not a de Polignac number, because 42156465 - 2² = 42156461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42156461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8296 + ... + 12374.

It is an arithmetic number, because the mean of its divisors is an integer number (2313360).

Almost surely, 2^42156465 is an apocalyptic number.

It is an amenable number.

42156465 is a deficient number, since it is larger than the sum of its proper divisors (31871055).

42156465 is a wasteful number, since it uses less digits than its factorization.

42156465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153.

The product of its digits is 28800, while the sum is 33.

The square root of 42156465 is about 6492.8010134302. The cubic root of 42156465 is about 348.0337776039.

The spelling of 42156465 in words is "forty-two million, one hundred fifty-six thousand, four hundred sixty-five".