74013251 has 4 divisors (see below), whose sum is σ = 79706592. Its totient is φ = 68319912.

The previous prime is 74013229. The next prime is 74013259. The reversal of 74013251 is 15231047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15231047 = 13 ⋅1171619.

It is a cyclic number.

It is not a de Polignac number, because 74013251 - 2¹⁰ = 74012227 is a prime.

It is a super-2 number, since 2×74013251² = 10955922647178002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74013259) 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, 2846651 + ... + 2846676.

It is an arithmetic number, because the mean of its divisors is an integer number (19926648).

Almost surely, 2^74013251 is an apocalyptic number.

74013251 is a deficient number, since it is larger than the sum of its proper divisors (5693341).

74013251 is a wasteful number, since it uses less digits than its factorization.

74013251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693340.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 74013251 is about 8603.0954312968. The cubic root of 74013251 is about 419.8587034151.

Adding to 74013251 its reverse (15231047), we get a palindrome (89244298).

The spelling of 74013251 in words is "seventy-four million, thirteen thousand, two hundred fifty-one".