7251913 has 4 divisors (see below), whose sum is σ = 7261060. Its totient is φ = 7242768.

The previous prime is 7251899. The next prime is 7251919. The reversal of 7251913 is 3191527.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6411024 + 840889 = 2532^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251913 - 2¹³ = 7243721 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7251919) 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, 3258 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (1815265).

Almost surely, 2^7251913 is an apocalyptic number.

It is an amenable number.

7251913 is a deficient number, since it is larger than the sum of its proper divisors (9147).

7251913 is an equidigital number, since it uses as much as digits as its factorization.

7251913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9146.

The product of its digits is 1890, while the sum is 28.

The square root of 7251913 is about 2692.9376153190. The cubic root of 7251913 is about 193.5608534930.

The spelling of 7251913 in words is "seven million, two hundred fifty-one thousand, nine hundred thirteen".