7211257 has 8 divisors (see below), whose sum is σ = 7471872. Its totient is φ = 6955200.

The previous prime is 7211249. The next prime is 7211261. The reversal of 7211257 is 7521127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7211257 - 2³ = 7211249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7211287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257 + ... + 4417.

It is an arithmetic number, because the mean of its divisors is an integer number (933984).

Almost surely, 2^7211257 is an apocalyptic number.

It is an amenable number.

7211257 is a deficient number, since it is larger than the sum of its proper divisors (260615).

7211257 is a wasteful number, since it uses less digits than its factorization.

7211257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279.

The product of its digits is 980, while the sum is 25.

The square root of 7211257 is about 2685.3783718500. The cubic root of 7211257 is about 193.1984589092.

The spelling of 7211257 in words is "seven million, two hundred eleven thousand, two hundred fifty-seven".