1120657 has 4 divisors (see below), whose sum is σ = 1186596. Its totient is φ = 1054720.

The previous prime is 1120649. The next prime is 1120661. The reversal of 1120657 is 7560211.

1120657 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 712336 = 639^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120657 - 2³ = 1120649 is a prime.

It is a super-2 number, since 2×1120657² = 2511744223298, which contains 22 as substring.

It is a Duffinian number.

1120657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1120607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32944 + ... + 32977.

It is an arithmetic number, because the mean of its divisors is an integer number (296649).

2^1120657 is an apocalyptic number.

1120657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1120657 is a deficient number, since it is larger than the sum of its proper divisors (65939).

1120657 is an equidigital number, since it uses as much as digits as its factorization.

1120657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65938.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1120657 is about 1058.6108822414. The cubic root of 1120657 is about 103.8701844286.

Adding to 1120657 its reverse (7560211), we get a palindrome (8680868).

The spelling of 1120657 in words is "one million, one hundred twenty thousand, six hundred fifty-seven".