151240639 has 4 divisors (see below), whose sum is σ = 164989800. Its totient is φ = 137491480.

The previous prime is 151240631. The next prime is 151240667. The reversal of 151240639 is 936042151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 151240639 - 2³ = 151240631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151240639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151240631) 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, 6874564 + ... + 6874585.

It is an arithmetic number, because the mean of its divisors is an integer number (41247450).

Almost surely, 2^151240639 is an apocalyptic number.

151240639 is a deficient number, since it is larger than the sum of its proper divisors (13749161).

151240639 is a wasteful number, since it uses less digits than its factorization.

151240639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13749160.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 151240639 is about 12297.9932915903. The cubic root of 151240639 is about 532.7901263080.

The spelling of 151240639 in words is "one hundred fifty-one million, two hundred forty thousand, six hundred thirty-nine".