42490749 has 8 divisors (see below), whose sum is σ = 64747840. Its totient is φ = 24280416.

The previous prime is 42490741. The next prime is 42490759. The reversal of 42490749 is 94709424.

It is a happy number.

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

It is not a de Polignac number, because 42490749 - 2³ = 42490741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42490741) 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, 1011664 + ... + 1011705.

It is an arithmetic number, because the mean of its divisors is an integer number (8093480).

Almost surely, 2^42490749 is an apocalyptic number.

It is an amenable number.

42490749 is a deficient number, since it is larger than the sum of its proper divisors (22257091).

42490749 is a wasteful number, since it uses less digits than its factorization.

42490749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023379.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 42490749 is about 6518.4928472769. The cubic root of 42490749 is about 348.9512798606.

The spelling of 42490749 in words is "forty-two million, four hundred ninety thousand, seven hundred forty-nine".