11421651 has 4 divisors (see below), whose sum is σ = 15228872. Its totient is φ = 7614432.

The previous prime is 11421629. The next prime is 11421661. The reversal of 11421651 is 15612411.

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

It is not a de Polignac number, because 11421651 - 2⁶ = 11421587 is a prime.

It is a super-2 number, since 2×11421651² = 260908223131602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11421601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903606 + ... + 1903611.

It is an arithmetic number, because the mean of its divisors is an integer number (3807218).

Almost surely, 2^11421651 is an apocalyptic number.

11421651 is a deficient number, since it is larger than the sum of its proper divisors (3807221).

11421651 is an equidigital number, since it uses as much as digits as its factorization.

11421651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807220.

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

The square root of 11421651 is about 3379.5933187293. The cubic root of 11421651 is about 225.2041012202.

The spelling of 11421651 in words is "eleven million, four hundred twenty-one thousand, six hundred fifty-one".