121969280 has 32 divisors (see below), whose sum is σ = 291584340. Its totient is φ = 48787456.

The previous prime is 121969261. The next prime is 121969291. The reversal of 121969280 is 82969121.

It can be written as a sum of positive squares in 2 ways, for example, as 113720896 + 8248384 = 10664^2 + 2872^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94649 + ... + 95928.

Almost surely, 2^121969280 is an apocalyptic number.

121969280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121969280 is an abundant number, since it is smaller than the sum of its proper divisors (169615060).

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

121969280 is an equidigital number, since it uses as much as digits as its factorization.

121969280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190596 (or 190584 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 121969280 is about 11043.9703005758. The cubic root of 121969280 is about 495.9259341365.

The spelling of 121969280 in words is "one hundred twenty-one million, nine hundred sixty-nine thousand, two hundred eighty".