121263428 has 48 divisors (see below), whose sum is σ = 251899200. Its totient is φ = 50352000.

The previous prime is 121263409. The next prime is 121263449. The reversal of 121263428 is 824362121.

It is a happy number.

It is a super-2 number, since 2×121263428² = 29409637940622368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121263428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56723 + ... + 58821.

It is an arithmetic number, because the mean of its divisors is an integer number (5247900).

Almost surely, 2^121263428 is an apocalyptic number.

It is an amenable number.

121263428 is an abundant number, since it is smaller than the sum of its proper divisors (130635772).

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

121263428 is a wasteful number, since it uses less digits than its factorization.

121263428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 2226 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 121263428 is about 11011.9674899629. The cubic root of 121263428 is about 494.9674202276.

The spelling of 121263428 in words is "one hundred twenty-one million, two hundred sixty-three thousand, four hundred twenty-eight".