121454861 has 4 divisors (see below), whose sum is σ = 132496224. Its totient is φ = 110413500.

The previous prime is 121454857. The next prime is 121454867. The reversal of 121454861 is 168454121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 168454121 = 11 ⋅15314011.

It is a cyclic number.

It is not a de Polignac number, because 121454861 - 2² = 121454857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121454867) 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, 5520665 + ... + 5520686.

It is an arithmetic number, because the mean of its divisors is an integer number (33124056).

Almost surely, 2^121454861 is an apocalyptic number.

121454861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121454861 is a deficient number, since it is larger than the sum of its proper divisors (11041363).

121454861 is a wasteful number, since it uses less digits than its factorization.

121454861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11041362.

The product of its digits is 7680, while the sum is 32.

The square root of 121454861 is about 11020.6561056953. The cubic root of 121454861 is about 495.2277440604.

The spelling of 121454861 in words is "one hundred twenty-one million, four hundred fifty-four thousand, eight hundred sixty-one".