12261388 has 6 divisors (see below), whose sum is σ = 21457436. Its totient is φ = 6130692.

The previous prime is 12261383. The next prime is 12261409. The reversal of 12261388 is 88316221.

It is not an unprimeable number, because it can be changed into a prime (12261383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1532670 + ... + 1532677.

Almost surely, 2^12261388 is an apocalyptic number.

It is an amenable number.

12261388 is a deficient number, since it is larger than the sum of its proper divisors (9196048).

12261388 is a wasteful number, since it uses less digits than its factorization.

12261388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065351 (or 3065349 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 12261388 is about 3501.6264792236. The cubic root of 12261388 is about 230.5932260141.

The spelling of 12261388 in words is "twelve million, two hundred sixty-one thousand, three hundred eighty-eight".