1098657 has 16 divisors (see below), whose sum is σ = 1860480. Its totient is φ = 627696.

The previous prime is 1098649. The next prime is 1098667. The reversal of 1098657 is 7568901.

It is not a de Polignac number, because 1098657 - 2³ = 1098649 is a prime.

1098657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1098667) 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, 2718 + ... + 3095.

It is an arithmetic number, because the mean of its divisors is an integer number (116280).

2^1098657 is an apocalyptic number.

It is an amenable number.

1098657 is a deficient number, since it is larger than the sum of its proper divisors (761823).

1098657 is an equidigital number, since it uses as much as digits as its factorization.

1098657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5829 (or 5823 counting only the distinct ones).

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

The square root of 1098657 is about 1048.1684025003. The cubic root of 1098657 is about 103.1859837644.

The spelling of 1098657 in words is "one million, ninety-eight thousand, six hundred fifty-seven".