121139459 has 24 divisors (see below), whose sum is σ = 152835840. Its totient is φ = 93619152.

The previous prime is 121139441. The next prime is 121139477. The reversal of 121139459 is 954931121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121139441) and next prime (121139477).

It is not a de Polignac number, because 121139459 - 2¹⁶ = 121073923 is a prime.

It is a super-3 number, since 3×121139459³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121139479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 608642 + ... + 608840.

It is an arithmetic number, because the mean of its divisors is an integer number (6368160).

Almost surely, 2^121139459 is an apocalyptic number.

121139459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121139459 is a deficient number, since it is larger than the sum of its proper divisors (31696381).

121139459 is an equidigital number, since it uses as much as digits as its factorization.

121139459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 248 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 121139459 is about 11006.3372199838. The cubic root of 121139459 is about 494.7986924177.

The spelling of 121139459 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, four hundred fifty-nine".