12697740 has 144 divisors (see below), whose sum is σ = 43164576. Its totient is φ = 3020160.

The previous prime is 12697739. The next prime is 12697753. The reversal of 12697740 is 4779621.

It is a happy number.

It is a super-2 number, since 2×12697740² = 322465202215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12697695 and 12697704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239554 + ... + 239606.

It is an arithmetic number, because the mean of its divisors is an integer number (299754).

It is a vampire number, since it can be written as 1749 ⋅ 7260 (with its own digits).

Almost surely, 2^12697740 is an apocalyptic number.

12697740 is a gapful number since it is divisible by the number (10) 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 12697740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21582288).

12697740 is an abundant number, since it is smaller than the sum of its proper divisors (30466836).

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

12697740 is a wasteful number, since it uses less digits than its factorization.

12697740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 12697740 is about 3563.3888364870. The cubic root of 12697740 is about 233.2968151466.

It can be divided in two parts, 1269 and 7740, that added together give a palindrome (9009).

The spelling of 12697740 in words is "twelve million, six hundred ninety-seven thousand, seven hundred forty".