1137645 has 30 divisors (see below), whose sum is σ = 2078538. Its totient is φ = 595296.

The previous prime is 1137629. The next prime is 1137659. The reversal of 1137645 is 5467311.

1137645 is a `hidden beast` number, since 1 + 13 + 7 + 645 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 311364 + 826281 = 558^2 + 909^2 .

It is not a de Polignac number, because 1137645 - 2⁴ = 1137629 is a prime.

It is a super-3 number, since 3×1137645³ = 4417143841033833375, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 21439 + ... + 21491.

2^1137645 is an apocalyptic number.

1137645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1137645 is a deficient number, since it is larger than the sum of its proper divisors (940893).

1137645 is an frugal number, since it uses more digits than its factorization.

1137645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 61 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1137645 is about 1066.6044252674. The cubic root of 1137645 is about 104.3924092777.

The spelling of 1137645 in words is "one million, one hundred thirty-seven thousand, six hundred forty-five".