1631057 has 2 divisors, whose sum is σ = 1631058. Its totient is φ = 1631056.

The previous prime is 1631053. The next prime is 1631059. The reversal of 1631057 is 7501361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1547536 + 83521 = 1244^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631057 - 2² = 1631053 is a prime.

Together with 1631059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1631051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815528 + 815529.

It is an arithmetic number, because the mean of its divisors is an integer number (815529).

2^1631057 is an apocalyptic number.

It is an amenable number.

1631057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631057 is an equidigital number, since it uses as much as digits as its factorization.

1631057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 1631057 is about 1277.1284195413. The cubic root of 1631057 is about 117.7126254176.

The spelling of 1631057 in words is "one million, six hundred thirty-one thousand, fifty-seven".