42139039457 has 4 divisors (see below), whose sum is σ = 42253860096. Its totient is φ = 42024218820.

The previous prime is 42139039451. The next prime is 42139039463. The reversal of 42139039457 is 75493093124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (42139039451) and next prime (42139039463).

It is a cyclic number.

It is not a de Polignac number, because 42139039457 - 2⁴ = 42139039441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42139039451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57409769 + ... + 57410502.

It is an arithmetic number, because the mean of its divisors is an integer number (10563465024).

Almost surely, 2^42139039457 is an apocalyptic number.

It is an amenable number.

42139039457 is a deficient number, since it is larger than the sum of its proper divisors (114820639).

42139039457 is a wasteful number, since it uses less digits than its factorization.

42139039457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114820638.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 42139039457 in words is "forty-two billion, one hundred thirty-nine million, thirty-nine thousand, four hundred fifty-seven".