121456404 has 18 divisors (see below), whose sum is σ = 307014890. Its totient is φ = 40485456.

The previous prime is 121456403. The next prime is 121456409. The reversal of 121456404 is 404654121.

121456404 is a `hidden beast` number, since 1 + 2 + 14 + 5 + 640 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110880900 + 10575504 = 10530^2 + 3252^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×121456404² = 29503316145222432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121456403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1686859 + ... + 1686930.

Almost surely, 2^121456404 is an apocalyptic number.

It is an amenable number.

121456404 is an abundant number, since it is smaller than the sum of its proper divisors (185558486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121456404 is a wasteful number, since it uses less digits than its factorization.

121456404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373799 (or 3373794 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 121456404 is about 11020.7261103795. The cubic root of 121456404 is about 495.2298412268.

The spelling of 121456404 in words is "one hundred twenty-one million, four hundred fifty-six thousand, four hundred four".