121405455 has 48 divisors (see below), whose sum is σ = 224789760. Its totient is φ = 60480000.

The previous prime is 121405451. The next prime is 121405481. The reversal of 121405455 is 554504121.

It is not a de Polignac number, because 121405455 - 2² = 121405451 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121405451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38955 + ... + 41955.

It is an arithmetic number, because the mean of its divisors is an integer number (4683120).

Almost surely, 2^121405455 is an apocalyptic number.

121405455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121405455 is a deficient number, since it is larger than the sum of its proper divisors (103384305).

121405455 is a wasteful number, since it uses less digits than its factorization.

121405455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 121405455 is about 11018.4143596073. The cubic root of 121405455 is about 495.1605845683.

Adding to 121405455 its reverse (554504121), we get a palindrome (675909576).

The spelling of 121405455 in words is "one hundred twenty-one million, four hundred five thousand, four hundred fifty-five".