121565072 has 20 divisors (see below), whose sum is σ = 235861020. Its totient is φ = 60697728.

The previous prime is 121565069. The next prime is 121565111. The reversal of 121565072 is 270565121.

It can be written as a sum of positive squares in 2 ways, for example, as 57820816 + 63744256 = 7604^2 + 7984^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7454 + ... + 17282.

It is an arithmetic number, because the mean of its divisors is an integer number (11793051).

Almost surely, 2^121565072 is an apocalyptic number.

It is an amenable number.

121565072 is a deficient number, since it is larger than the sum of its proper divisors (114295948).

121565072 is an equidigital number, since it uses as much as digits as its factorization.

121565072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610 (or 10604 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 121565072 is about 11025.6551732766. The cubic root of 121565072 is about 495.3774925454.

The spelling of 121565072 in words is "one hundred twenty-one million, five hundred sixty-five thousand, seventy-two".