42090491 has 8 divisors (see below), whose sum is σ = 44520000. Its totient is φ = 39682440.

The previous prime is 42090469. The next prime is 42090493. The reversal of 42090491 is 19409024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42090491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42090493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241 + ... + 9258.

It is an arithmetic number, because the mean of its divisors is an integer number (5565000).

Almost surely, 2^42090491 is an apocalyptic number.

42090491 is a deficient number, since it is larger than the sum of its proper divisors (2429509).

42090491 is a wasteful number, since it uses less digits than its factorization.

42090491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 42090491 is about 6487.7184741633. The cubic root of 42090491 is about 347.8521275787.

The spelling of 42090491 in words is "forty-two million, ninety thousand, four hundred ninety-one".