121590387 has 12 divisors (see below), whose sum is σ = 175754904. Its totient is φ = 81002880.

The previous prime is 121590361. The next prime is 121590419. The reversal of 121590387 is 783095121.

It is not a de Polignac number, because 121590387 - 2⁶ = 121590323 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (121590317) 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 11 ways as a sum of consecutive naturals, for example, 11587 + ... + 19427.

It is an arithmetic number, because the mean of its divisors is an integer number (14646242).

Almost surely, 2^121590387 is an apocalyptic number.

121590387 is a deficient number, since it is larger than the sum of its proper divisors (54164517).

121590387 is a wasteful number, since it uses less digits than its factorization.

121590387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570 (or 9567 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 121590387 is about 11026.8031178579. The cubic root of 121590387 is about 495.4118763549.

The spelling of 121590387 in words is "one hundred twenty-one million, five hundred ninety thousand, three hundred eighty-seven".