121874581 has 8 divisors (see below), whose sum is σ = 129199320. Its totient is φ = 114567168.

The previous prime is 121874573. The next prime is 121874587. The reversal of 121874581 is 185478121.

It can be written as a sum of positive squares in 4 ways, for example, as 5428900 + 116445681 = 2330^2 + 10791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121874581 - 2³ = 121874573 is a prime.

It is a super-2 number, since 2×121874581² = 29706826987851122, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121874581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121874587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11935 + ... + 19651.

It is an arithmetic number, because the mean of its divisors is an integer number (16149915).

Almost surely, 2^121874581 is an apocalyptic number.

It is an amenable number.

121874581 is a deficient number, since it is larger than the sum of its proper divisors (7324739).

121874581 is an equidigital number, since it uses as much as digits as its factorization.

121874581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8663.

The product of its digits is 17920, while the sum is 37.

The square root of 121874581 is about 11039.6821059304. The cubic root of 121874581 is about 495.7975524934.

The spelling of 121874581 in words is "one hundred twenty-one million, eight hundred seventy-four thousand, five hundred eighty-one".