1057698 has 20 divisors (see below), whose sum is σ = 2370390. Its totient is φ = 352512.

The previous prime is 1057681. The next prime is 1057699. The reversal of 1057698 is 8967501.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 23409 = 1017^2 + 153^2 .

It is a super-2 number, since 2×1057698² = 2237450118408, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1057699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3103 + ... + 3426.

2^1057698 is an apocalyptic number.

1057698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1057698 is an abundant number, since it is smaller than the sum of its proper divisors (1312692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1057698 is an equidigital number, since it uses as much as digits as its factorization.

1057698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543 (or 6534 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1057698 is about 1028.4444564487. Note that the first 4 decimals coincide. The cubic root of 1057698 is about 101.8874190388.

The spelling of 1057698 in words is "one million, fifty-seven thousand, six hundred ninety-eight".