6945520 has 40 divisors (see below), whose sum is σ = 17101584. Its totient is φ = 2614272.

The previous prime is 6945511. The next prime is 6945527. The reversal of 6945520 is 255496.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×6945520³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6945527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194 + ... + 3913.

Almost surely, 2^6945520 is an apocalyptic number.

It is an amenable number.

6945520 is an abundant number, since it is smaller than the sum of its proper divisors (10156064).

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

6945520 is a wasteful number, since it uses less digits than its factorization.

6945520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 6945520 is about 2635.4354478909. The cubic root of 6945520 is about 190.7955562139.

The spelling of 6945520 in words is "six million, nine hundred forty-five thousand, five hundred twenty".