12291896 has 8 divisors (see below), whose sum is σ = 23047320. Its totient is φ = 6145944.

The previous prime is 12291893. The next prime is 12291899. The reversal of 12291896 is 69819221.

It is an interprime number because it is at equal distance from previous prime (12291893) and next prime (12291899).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12291893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 768236 + ... + 768251.

It is an arithmetic number, because the mean of its divisors is an integer number (2880915).

Almost surely, 2^12291896 is an apocalyptic number.

It is an amenable number.

12291896 is a deficient number, since it is larger than the sum of its proper divisors (10755424).

12291896 is a wasteful number, since it uses less digits than its factorization.

12291896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536493 (or 1536489 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 12291896 is about 3505.9800341702. The cubic root of 12291896 is about 230.7843167118.

It can be divided in two parts, 1229 and 1896, that added together give a 5-th power (3125 = 5⁵).

The spelling of 12291896 in words is "twelve million, two hundred ninety-one thousand, eight hundred ninety-six".