42092987 has 4 divisors (see below), whose sum is σ = 42132456. Its totient is φ = 42053520.

The previous prime is 42092983. The next prime is 42092993. The reversal of 42092987 is 78929024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42092987 - 2² = 42092983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42092983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18089 + ... + 20282.

It is an arithmetic number, because the mean of its divisors is an integer number (10533114).

Almost surely, 2^42092987 is an apocalyptic number.

42092987 is a deficient number, since it is larger than the sum of its proper divisors (39469).

42092987 is a wasteful number, since it uses less digits than its factorization.

42092987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39468.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 42092987 is about 6487.9108347757. The cubic root of 42092987 is about 347.8590034132.

The spelling of 42092987 in words is "forty-two million, ninety-two thousand, nine hundred eighty-seven".