74240251 has 4 divisors (see below), whose sum is σ = 77468112. Its totient is φ = 71012392.

The previous prime is 74240219. The next prime is 74240267. The reversal of 74240251 is 15204247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74240251 - 2⁵ = 74240219 is a prime.

It is a super-2 number, since 2×74240251² = 11023229737086002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74244251) 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, 1613896 + ... + 1613941.

It is an arithmetic number, because the mean of its divisors is an integer number (19367028).

Almost surely, 2^74240251 is an apocalyptic number.

74240251 is a deficient number, since it is larger than the sum of its proper divisors (3227861).

74240251 is a wasteful number, since it uses less digits than its factorization.

74240251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227860.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 74240251 is about 8616.2782568810. The cubic root of 74240251 is about 420.2875034521.

Adding to 74240251 its reverse (15204247), we get a palindrome (89444498).

The spelling of 74240251 in words is "seventy-four million, two hundred forty thousand, two hundred fifty-one".