1630257 has 16 divisors (see below), whose sum is σ = 2352960. Its totient is φ = 1000512.

The previous prime is 1630253. The next prime is 1630261. The reversal of 1630257 is 7520361.

It is an interprime number because it is at equal distance from previous prime (1630253) and next prime (1630261).

It is not a de Polignac number, because 1630257 - 2² = 1630253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1723 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (147060).

2^1630257 is an apocalyptic number.

It is an amenable number.

1630257 is a deficient number, since it is larger than the sum of its proper divisors (722703).

1630257 is a wasteful number, since it uses less digits than its factorization.

1630257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1630257 is about 1276.8151784812. The cubic root of 1630257 is about 117.6933770609.

The spelling of 1630257 in words is "one million, six hundred thirty thousand, two hundred fifty-seven".