74121253 has 4 divisors (see below), whose sum is σ = 74191660. Its totient is φ = 74050848.

The previous prime is 74121251. The next prime is 74121259. The reversal of 74121253 is 35212147.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35212147 = 127 ⋅277261.

It can be written as a sum of positive squares in 2 ways, for example, as 36397089 + 37724164 = 6033^2 + 6142^2 .

It is a cyclic number.

It is not a de Polignac number, because 74121253 - 2¹ = 74121251 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 (74121251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33600 + ... + 35737.

It is an arithmetic number, because the mean of its divisors is an integer number (18547915).

Almost surely, 2^74121253 is an apocalyptic number.

It is an amenable number.

74121253 is a deficient number, since it is larger than the sum of its proper divisors (70407).

74121253 is a wasteful number, since it uses less digits than its factorization.

74121253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70406.

The product of its digits is 1680, while the sum is 25.

The square root of 74121253 is about 8609.3700698715. The cubic root of 74121253 is about 420.0628269581.

The spelling of 74121253 in words is "seventy-four million, one hundred twenty-one thousand, two hundred fifty-three".