121453641 has 8 divisors (see below), whose sum is σ = 179931360. Its totient is φ = 80969076.

The previous prime is 121453621. The next prime is 121453669. The reversal of 121453641 is 146354121.

It is a happy number.

121453641 is a `hidden beast` number, since 1 + 2 + 14 + 5 + 3 + 641 = 666.

It is not a de Polignac number, because 121453641 - 2²⁵ = 87899209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4498283 = 121453641 / (1 + 2 + 1 + 4 + 5 + 3 + 6 + 4 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121453601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249115 + ... + 2249168.

It is an arithmetic number, because the mean of its divisors is an integer number (22491420).

Almost surely, 2^121453641 is an apocalyptic number.

It is an amenable number.

121453641 is a deficient number, since it is larger than the sum of its proper divisors (58477719).

121453641 is an equidigital number, since it uses as much as digits as its factorization.

121453641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498292 (or 4498286 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 121453641 is about 11020.6007549498. The cubic root of 121453641 is about 495.2260858864.

The spelling of 121453641 in words is "one hundred twenty-one million, four hundred fifty-three thousand, six hundred forty-one".