121254387 has 16 divisors (see below), whose sum is σ = 173532960. Its totient is φ = 75036672.

The previous prime is 121254383. The next prime is 121254391. The reversal of 121254387 is 783452121.

It is an interprime number because it is at equal distance from previous prime (121254383) and next prime (121254391).

It is not a de Polignac number, because 121254387 - 2² = 121254383 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (121254383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12562 + ... + 20007.

It is an arithmetic number, because the mean of its divisors is an integer number (10845810).

Almost surely, 2^121254387 is an apocalyptic number.

121254387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121254387 is a deficient number, since it is larger than the sum of its proper divisors (52278573).

121254387 is a wasteful number, since it uses less digits than its factorization.

121254387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32662.

The product of its digits is 13440, while the sum is 33.

The square root of 121254387 is about 11011.5569743792. The cubic root of 121254387 is about 494.9551188774.

The spelling of 121254387 in words is "one hundred twenty-one million, two hundred fifty-four thousand, three hundred eighty-seven".