7081257 has 4 divisors (see below), whose sum is σ = 9441680. Its totient is φ = 4720836.

The previous prime is 7081253. The next prime is 7081267. The reversal of 7081257 is 7521807.

It is a happy number.

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 not a de Polignac number, because 7081257 - 2² = 7081253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7081253) 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, 1180207 + ... + 1180212.

It is an arithmetic number, because the mean of its divisors is an integer number (2360420).

Almost surely, 2^7081257 is an apocalyptic number.

It is an amenable number.

7081257 is a deficient number, since it is larger than the sum of its proper divisors (2360423).

7081257 is a wasteful number, since it uses less digits than its factorization.

7081257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360422.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 7081257 is about 2661.0631334112. The cubic root of 7081257 is about 192.0304584925.

The spelling of 7081257 in words is "seven million, eighty-one thousand, two hundred fifty-seven".