121457428 has 24 divisors (see below), whose sum is σ = 216203904. Its totient is φ = 59690400.

The previous prime is 121457417. The next prime is 121457431. The reversal of 121457428 is 824754121.

It is a junction number, because it is equal to n+sod(n) for n = 121457393 and 121457402.

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, 183418 + ... + 184078.

It is an arithmetic number, because the mean of its divisors is an integer number (9008496).

Almost surely, 2^121457428 is an apocalyptic number.

It is an amenable number.

121457428 is a deficient number, since it is larger than the sum of its proper divisors (94746476).

121457428 is a wasteful number, since it uses less digits than its factorization.

121457428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1381 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 121457428 is about 11020.7725682005. The cubic root of 121457428 is about 495.2312329852.

The spelling of 121457428 in words is "one hundred twenty-one million, four hundred fifty-seven thousand, four hundred twenty-eight".