121352987 has 32 divisors (see below), whose sum is σ = 152285184. Its totient is φ = 94348800.

The previous prime is 121352983. The next prime is 121352999. The reversal of 121352987 is 789253121.

It is not a de Polignac number, because 121352987 - 2² = 121352983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121352987.

It is not an unprimeable number, because it can be changed into a prime (121352983) 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 31 ways as a sum of consecutive naturals, for example, 447662 + ... + 447932.

It is an arithmetic number, because the mean of its divisors is an integer number (4758912).

Almost surely, 2^121352987 is an apocalyptic number.

121352987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121352987 is a deficient number, since it is larger than the sum of its proper divisors (30932197).

121352987 is a wasteful number, since it uses less digits than its factorization.

121352987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its digits is 30240, while the sum is 38.

The square root of 121352987 is about 11016.0331789624. The cubic root of 121352987 is about 495.0892428287.

The spelling of 121352987 in words is "one hundred twenty-one million, three hundred fifty-two thousand, nine hundred eighty-seven".