121757072 has 20 divisors (see below), whose sum is σ = 240925056. Its totient is φ = 59582880.

The previous prime is 121757063. The next prime is 121757081. The reversal of 121757072 is 270757121.

It is an interprime number because it is at equal distance from previous prime (121757063) and next prime (121757081).

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 80204 + ... + 81707.

Almost surely, 2^121757072 is an apocalyptic number.

It is an amenable number.

121757072 is a deficient number, since it is larger than the sum of its proper divisors (119167984).

121757072 is a wasteful number, since it uses less digits than its factorization.

121757072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161966 (or 161960 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 121757072 is about 11034.3587036130. The cubic root of 121757072 is about 495.6381552706.

The spelling of 121757072 in words is "one hundred twenty-one million, seven hundred fifty-seven thousand, seventy-two".