2147257 has 8 divisors (see below), whose sum is σ = 2560896. Its totient is φ = 1760352.

The previous prime is 2147251. The next prime is 2147263. The reversal of 2147257 is 7527412.

It is an interprime number because it is at equal distance from previous prime (2147251) and next prime (2147263).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2147257 is a prime.

It is a super-2 number, since 2×2147257² = 9221425248098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2147251) 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, 6508 + ... + 6829.

It is an arithmetic number, because the mean of its divisors is an integer number (320112).

2^2147257 is an apocalyptic number.

It is an amenable number.

2147257 is a deficient number, since it is larger than the sum of its proper divisors (413639).

2147257 is a wasteful number, since it uses less digits than its factorization.

2147257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13367.

The product of its digits is 3920, while the sum is 28.

The square root of 2147257 is about 1465.3521760997. The cubic root of 2147257 is about 129.0113765181.

It can be divided in two parts, 21 and 47257, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 2147257 in words is "two million, one hundred forty-seven thousand, two hundred fifty-seven".