1051657 has 4 divisors (see below), whose sum is σ = 1057300. Its totient is φ = 1046016.

The previous prime is 1051649. The next prime is 1051663. The reversal of 1051657 is 7561501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7561501 = 47 ⋅160883.

It can be written as a sum of positive squares in 2 ways, for example, as 175561 + 876096 = 419^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051657 - 2³ = 1051649 is a prime.

It is a super-2 number, since 2×1051657² = 2211964891298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532 + ... + 2917.

It is an arithmetic number, because the mean of its divisors is an integer number (264325).

2^1051657 is an apocalyptic number.

It is an amenable number.

1051657 is a deficient number, since it is larger than the sum of its proper divisors (5643).

1051657 is an equidigital number, since it uses as much as digits as its factorization.

1051657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 1051657 is about 1025.5032910722. The cubic root of 1051657 is about 101.6930732565.

The spelling of 1051657 in words is "one million, fifty-one thousand, six hundred fifty-seven".