12697776 has 320 divisors, whose sum is σ = 49996800. Its totient is φ = 2985984.

The previous prime is 12697753. The next prime is 12697777. The reversal of 12697776 is 67779621.

It is a super-2 number, since 2×12697776² = 322467030692352, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12697777) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 668295 + ... + 668313.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

Almost surely, 2^12697776 is an apocalyptic number.

12697776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12697776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24998400).

12697776 is an abundant number, since it is smaller than the sum of its proper divisors (37299024).

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

12697776 is a wasteful number, since it uses less digits than its factorization.

12697776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 61 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 12697776 is about 3563.3938878547. The cubic root of 12697776 is about 233.2970356236.

It can be divided in two parts, 1269 and 7776, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 12697776 in words is "twelve million, six hundred ninety-seven thousand, seven hundred seventy-six".