11273621 has 4 divisors (see below), whose sum is σ = 11441952. Its totient is φ = 11105292.

The previous prime is 11273579. The next prime is 11273629. The reversal of 11273621 is 12637211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12637211 = 3001 ⋅4211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11273621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11273629) 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, 84065 + ... + 84198.

It is an arithmetic number, because the mean of its divisors is an integer number (2860488).

Almost surely, 2^11273621 is an apocalyptic number.

It is an amenable number.

11273621 is a deficient number, since it is larger than the sum of its proper divisors (168331).

11273621 is an equidigital number, since it uses as much as digits as its factorization.

11273621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168330.

The product of its digits is 504, while the sum is 23.

The square root of 11273621 is about 3357.6213306447. The cubic root of 11273621 is about 224.2269503081.

It can be divided in two parts, 11 and 273621, that multiplied together give a triangular number (3009831 = T₂₄₅₃).

The spelling of 11273621 in words is "eleven million, two hundred seventy-three thousand, six hundred twenty-one".