74242251 has 10 divisors (see below), whose sum is σ = 110905212. Its totient is φ = 49494780.

The previous prime is 74242211. The next prime is 74242279. The reversal of 74242251 is 15224247.

It is not a de Polignac number, because 74242251 - 2¹³ = 74234059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (74242211) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 458205 + ... + 458366.

Almost surely, 2^74242251 is an apocalyptic number.

74242251 is a deficient number, since it is larger than the sum of its proper divisors (36662961).

74242251 is an equidigital number, since it uses as much as digits as its factorization.

74242251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916583 (or 916574 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 74242251 is about 8616.3943154895. The cubic root of 74242251 is about 420.2912775389.

Adding to 74242251 its reverse (15224247), we get a palindrome (89466498).

The spelling of 74242251 in words is "seventy-four million, two hundred forty-two thousand, two hundred fifty-one".