11621451 has 4 divisors (see below), whose sum is σ = 15495272. Its totient is φ = 7747632.

The previous prime is 11621447. The next prime is 11621459. The reversal of 11621451 is 15412611.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11621451 - 2² = 11621447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11621459) 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 3 ways as a sum of consecutive naturals, for example, 1936906 + ... + 1936911.

It is an arithmetic number, because the mean of its divisors is an integer number (3873818).

Almost surely, 2^11621451 is an apocalyptic number.

11621451 is a deficient number, since it is larger than the sum of its proper divisors (3873821).

11621451 is an equidigital number, since it uses as much as digits as its factorization.

11621451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873820.

The product of its digits is 240, while the sum is 21.

The square root of 11621451 is about 3409.0249339071. The cubic root of 11621451 is about 226.5096897063.

The spelling of 11621451 in words is "eleven million, six hundred twenty-one thousand, four hundred fifty-one".