42139097 has 48 divisors (see below), whose sum is σ = 58988160. Its totient is φ = 29272320.

The previous prime is 42139087. The next prime is 42139109. The reversal of 42139097 is 79093124.

It is not a de Polignac number, because 42139097 - 2¹⁴ = 42122713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42139007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 473429 + ... + 473517.

It is an arithmetic number, because the mean of its divisors is an integer number (1228920).

Almost surely, 2^42139097 is an apocalyptic number.

It is an amenable number.

42139097 is a deficient number, since it is larger than the sum of its proper divisors (16849063).

42139097 is a wasteful number, since it uses less digits than its factorization.

42139097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 42139097 is about 6491.4633943357. The cubic root of 42139097 is about 347.9859756756.

The spelling of 42139097 in words is "forty-two million, one hundred thirty-nine thousand, ninety-seven".