74242253 has 4 divisors (see below), whose sum is σ = 78149760. Its totient is φ = 70334748.

The previous prime is 74242211. The next prime is 74242279. The reversal of 74242253 is 35224247.

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 a cyclic number.

It is not a de Polignac number, because 74242253 - 2⁸ = 74241997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74242283) 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, 1953725 + ... + 1953762.

It is an arithmetic number, because the mean of its divisors is an integer number (19537440).

Almost surely, 2^74242253 is an apocalyptic number.

It is an amenable number.

74242253 is a deficient number, since it is larger than the sum of its proper divisors (3907507).

74242253 is a wasteful number, since it uses less digits than its factorization.

74242253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907506.

The product of its digits is 13440, while the sum is 29.

The square root of 74242253 is about 8616.3944315473. The cubic root of 74242253 is about 420.2912813130.

The spelling of 74242253 in words is "seventy-four million, two hundred forty-two thousand, two hundred fifty-three".