121554004 has 24 divisors (see below), whose sum is σ = 249909408. Its totient is φ = 51001440.

The previous prime is 121553981. The next prime is 121554047. The reversal of 121554004 is 400455121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105682 + ... + 106825.

It is an arithmetic number, because the mean of its divisors is an integer number (10412892).

Almost surely, 2^121554004 is an apocalyptic number.

It is an amenable number.

121554004 is an abundant number, since it is smaller than the sum of its proper divisors (128355404).

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

121554004 is a wasteful number, since it uses less digits than its factorization.

121554004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212535 (or 212533 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121554004 is about 11025.1532415654. The cubic root of 121554004 is about 495.3624580611.

The spelling of 121554004 in words is "one hundred twenty-one million, five hundred fifty-four thousand, four".