11621391 has 8 divisors (see below), whose sum is σ = 15515904. Its totient is φ = 7737240.

The previous prime is 11621383. The next prime is 11621399. The reversal of 11621391 is 19312611.

It is an interprime number because it is at equal distance from previous prime (11621383) and next prime (11621399).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11621391 - 2³ = 11621383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586 + ... + 4856.

It is an arithmetic number, because the mean of its divisors is an integer number (1939488).

Almost surely, 2^11621391 is an apocalyptic number.

11621391 is a deficient number, since it is larger than the sum of its proper divisors (3894513).

11621391 is an equidigital number, since it uses as much as digits as its factorization.

11621391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181.

The product of its digits is 324, while the sum is 24.

The square root of 11621391 is about 3409.0161337254. The cubic root of 11621391 is about 226.5092998925.

The spelling of 11621391 in words is "eleven million, six hundred twenty-one thousand, three hundred ninety-one".