42495491 has 2 divisors, whose sum is σ = 42495492. Its totient is φ = 42495490.

The previous prime is 42495449. The next prime is 42495493. The reversal of 42495491 is 19459424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42495491 - 2¹⁰ = 42494467 is a prime.

Together with 42495493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42495493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21247745 + 21247746.

It is an arithmetic number, because the mean of its divisors is an integer number (21247746).

Almost surely, 2^42495491 is an apocalyptic number.

42495491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42495491 is an equidigital number, since it uses as much as digits as its factorization.

42495491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 42495491 is about 6518.8565715162. The cubic root of 42495491 is about 348.9642604541.

The spelling of 42495491 in words is "forty-two million, four hundred ninety-five thousand, four hundred ninety-one".