12591622 has 4 divisors (see below), whose sum is σ = 18887436. Its totient is φ = 6295810.

The previous prime is 12591617. The next prime is 12591643. The reversal of 12591622 is 22619521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22619521 = 103 ⋅219607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3147904 + ... + 3147907.

It is an arithmetic number, because the mean of its divisors is an integer number (4721859).

Almost surely, 2^12591622 is an apocalyptic number.

12591622 is a deficient number, since it is larger than the sum of its proper divisors (6295814).

12591622 is an equidigital number, since it uses as much as digits as its factorization.

12591622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6295813.

The product of its digits is 2160, while the sum is 28.

The square root of 12591622 is about 3548.4675565658. The cubic root of 12591622 is about 232.6450907690.

The spelling of 12591622 in words is "twelve million, five hundred ninety-one thousand, six hundred twenty-two".