11921455 has 48 divisors (see below), whose sum is σ = 18960480. Its totient is φ = 7112448.

The previous prime is 11921443. The next prime is 11921473. The reversal of 11921455 is 55412911.

It is not a de Polignac number, because 11921455 - 2⁵ = 11921423 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60417 + ... + 60613.

It is an arithmetic number, because the mean of its divisors is an integer number (395010).

Almost surely, 2^11921455 is an apocalyptic number.

11921455 is a deficient number, since it is larger than the sum of its proper divisors (7039025).

11921455 is a wasteful number, since it uses less digits than its factorization.

11921455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 241 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 11921455 is about 3452.7460086140. The cubic root of 11921455 is about 228.4422459205.

The spelling of 11921455 in words is "eleven million, nine hundred twenty-one thousand, four hundred fifty-five".