42491049 has 32 divisors (see below), whose sum is σ = 62361600. Its totient is φ = 25634880.

The previous prime is 42491027. The next prime is 42491083. The reversal of 42491049 is 94019424.

It is not a de Polignac number, because 42491049 - 2⁸ = 42490793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42491549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245527 + ... + 245699.

It is an arithmetic number, because the mean of its divisors is an integer number (1948800).

Almost surely, 2^42491049 is an apocalyptic number.

It is an amenable number.

42491049 is a deficient number, since it is larger than the sum of its proper divisors (19870551).

42491049 is a wasteful number, since it uses less digits than its factorization.

42491049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 42491049 is about 6518.5158586905. The cubic root of 42491049 is about 348.9521010993.

The spelling of 42491049 in words is "forty-two million, four hundred ninety-one thousand, forty-nine".