7256215 has 4 divisors (see below), whose sum is σ = 8707464. Its totient is φ = 5804968.

The previous prime is 7256213. The next prime is 7256251. The reversal of 7256215 is 5126527.

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 7256215 - 2¹ = 7256213 is a prime.

It is a super-2 number, since 2×7256215² = 105305312252450, which contains 22 as substring.

It is a Duffinian number.

7256215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7256213) 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, 725617 + ... + 725626.

It is an arithmetic number, because the mean of its divisors is an integer number (2176866).

Almost surely, 2^7256215 is an apocalyptic number.

7256215 is a deficient number, since it is larger than the sum of its proper divisors (1451249).

7256215 is a wasteful number, since it uses less digits than its factorization.

7256215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451248.

The product of its digits is 4200, while the sum is 28.

The square root of 7256215 is about 2693.7362528652. The cubic root of 7256215 is about 193.5991208296.

The spelling of 7256215 in words is "seven million, two hundred fifty-six thousand, two hundred fifteen".