12697540 has 24 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 5066208.

The previous prime is 12697523. The next prime is 12697543. The reversal of 12697540 is 4579621.

It is a super-2 number, since 2×12697540² = 322455044103200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12697496 and 12697505.

It is not an unprimeable number, because it can be changed into a prime (12697543) by changing a digit.

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, 13939 + ... + 14821.

It is an arithmetic number, because the mean of its divisors is an integer number (1113840).

Almost surely, 2^12697540 is an apocalyptic number.

12697540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12697540 is an abundant number, since it is smaller than the sum of its proper divisors (14034620).

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

12697540 is a wasteful number, since it uses less digits than its factorization.

12697540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 12697540 is about 3563.3607732027. The cubic root of 12697540 is about 233.2955902670.

The spelling of 12697540 in words is "twelve million, six hundred ninety-seven thousand, five hundred forty".