121552156 has 12 divisors (see below), whose sum is σ = 232054200. Its totient is φ = 55250960.

The previous prime is 121552129. The next prime is 121552157. The reversal of 121552156 is 651255121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121552157) by changing a digit.

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, 1381231 + ... + 1381318.

It is an arithmetic number, because the mean of its divisors is an integer number (19337850).

Almost surely, 2^121552156 is an apocalyptic number.

It is an amenable number.

121552156 is a deficient number, since it is larger than the sum of its proper divisors (110502044).

121552156 is a wasteful number, since it uses less digits than its factorization.

121552156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762564 (or 2762562 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 121552156 is about 11025.0694328879. The cubic root of 121552156 is about 495.3599476969.

The spelling of 121552156 in words is "one hundred twenty-one million, five hundred fifty-two thousand, one hundred fifty-six".