1345686520 has 32 divisors (see below), whose sum is σ = 3038595120. Its totient is φ = 536354560.

The previous prime is 1345686499. The next prime is 1345686521. The reversal of 1345686520 is 256865431.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345686521) 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, 48622 + ... + 71101.

Almost surely, 2^1345686520 is an apocalyptic number.

1345686520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345686520 is an abundant number, since it is smaller than the sum of its proper divisors (1692908600).

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

1345686520 is a wasteful number, since it uses less digits than its factorization.

1345686520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120015 (or 120011 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 1345686520 is about 36683.6001504760. The cubic root of 1345686520 is about 1104.0310828433.

The spelling of 1345686520 in words is "one billion, three hundred forty-five million, six hundred eighty-six thousand, five hundred twenty".