7138520 has 32 divisors (see below), whose sum is σ = 16167600. Its totient is φ = 2836608.

The previous prime is 7138513. The next prime is 7138541. The reversal of 7138520 is 258317.

7138520 is nontrivially palindromic in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 7138520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6662 + ... + 7658.

Almost surely, 2^7138520 is an apocalyptic number.

It is an amenable number.

7138520 is an abundant number, since it is smaller than the sum of its proper divisors (9029080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7138520 is a wasteful number, since it uses less digits than its factorization.

7138520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 7138520 is about 2671.8008907851. The cubic root of 7138520 is about 192.5466913220.

The spelling of 7138520 in words is "seven million, one hundred thirty-eight thousand, five hundred twenty".