1089657 has 12 divisors (see below), whose sum is σ = 1612884. Its totient is φ = 708480.

The previous prime is 1089653. The next prime is 1089661. The reversal of 1089657 is 7569801.

It is an interprime number because it is at equal distance from previous prime (1089653) and next prime (1089661).

It can be written as a sum of positive squares in 2 ways, for example, as 423801 + 665856 = 651^2 + 816^2 .

It is not a de Polignac number, because 1089657 - 2² = 1089653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1089653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1108 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (134407).

2^1089657 is an apocalyptic number.

It is an amenable number.

1089657 is a deficient number, since it is larger than the sum of its proper divisors (523227).

1089657 is a wasteful number, since it uses less digits than its factorization.

1089657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000 (or 2997 counting only the distinct ones).

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

The square root of 1089657 is about 1043.8663707582. The cubic root of 1089657 is about 102.9034505440.

The spelling of 1089657 in words is "one million, eighty-nine thousand, six hundred fifty-seven".