121904461 has 4 divisors (see below), whose sum is σ = 139319392. Its totient is φ = 104489532.

The previous prime is 121904407. The next prime is 121904473. The reversal of 121904461 is 164409121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121904461 - 2¹⁵ = 121871693 is a prime.

It is a super-2 number, since 2×121904461² = 29721395223401042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121904491) 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 3 ways as a sum of consecutive naturals, for example, 8707455 + ... + 8707468.

It is an arithmetic number, because the mean of its divisors is an integer number (34829848).

Almost surely, 2^121904461 is an apocalyptic number.

It is an amenable number.

121904461 is a deficient number, since it is larger than the sum of its proper divisors (17414931).

121904461 is an equidigital number, since it uses as much as digits as its factorization.

121904461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17414930.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 121904461 is about 11041.0353228309. The cubic root of 121904461 is about 495.8380674234.

The spelling of 121904461 in words is "one hundred twenty-one million, nine hundred four thousand, four hundred sixty-one".