11251621 has 2 divisors, whose sum is σ = 11251622. Its totient is φ = 11251620.

The previous prime is 11251613. The next prime is 11251651. The reversal of 11251621 is 12615211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9180900 + 2070721 = 3030^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 11251621 - 2³ = 11251613 is a prime.

It is a super-3 number, since 3×11251621³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11251601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5625810 + 5625811.

It is an arithmetic number, because the mean of its divisors is an integer number (5625811).

Almost surely, 2^11251621 is an apocalyptic number.

It is an amenable number.

11251621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11251621 is an equidigital number, since it uses as much as digits as its factorization.

11251621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 11251621 is about 3354.3436019585. The cubic root of 11251621 is about 224.0809988215.

Adding to 11251621 its reverse (12615211), we get a palindrome (23866832).

The spelling of 11251621 in words is "eleven million, two hundred fifty-one thousand, six hundred twenty-one".