12621512 has 8 divisors (see below), whose sum is σ = 23665350. Its totient is φ = 6310752.

The previous prime is 12621509. The next prime is 12621523. The reversal of 12621512 is 21512621.

It can be written as a sum of positive squares in only one way, i.e., 12292036 + 329476 = 3506^2 + 574^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12621512² = 318605130332288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 788837 + ... + 788852.

Almost surely, 2^12621512 is an apocalyptic number.

It is an amenable number.

12621512 is a deficient number, since it is larger than the sum of its proper divisors (11043838).

12621512 is a wasteful number, since it uses less digits than its factorization.

12621512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577695 (or 1577691 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 12621512 is about 3552.6767373348. The cubic root of 12621512 is about 232.8290296538.

The spelling of 12621512 in words is "twelve million, six hundred twenty-one thousand, five hundred twelve".