42090347 has 4 divisors (see below), whose sum is σ = 45328080. Its totient is φ = 38852616.

The previous prime is 42090319. The next prime is 42090359. The reversal of 42090347 is 74309024.

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 42090347 - 2⁸ = 42090091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42090247) 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, 1618847 + ... + 1618872.

It is an arithmetic number, because the mean of its divisors is an integer number (11332020).

Almost surely, 2^42090347 is an apocalyptic number.

42090347 is a deficient number, since it is larger than the sum of its proper divisors (3237733).

42090347 is a wasteful number, since it uses less digits than its factorization.

42090347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237732.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 42090347 is about 6487.7073762617. The cubic root of 42090347 is about 347.8517308876.

The spelling of 42090347 in words is "forty-two million, ninety thousand, three hundred forty-seven".