1162640 has 20 divisors (see below), whose sum is σ = 2703324. Its totient is φ = 465024.

The previous prime is 1162631. The next prime is 1162649. The reversal of 1162640 is 462611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1162631) and next prime (1162649).

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 620944 = 736^2 + 788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1162649) 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, 7187 + ... + 7346.

2^1162640 is an apocalyptic number.

1162640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1162640 is an abundant number, since it is smaller than the sum of its proper divisors (1540684).

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

1162640 is a wasteful number, since it uses less digits than its factorization.

1162640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546 (or 14540 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1162640 is about 1078.2578541332. The cubic root of 1162640 is about 105.1514066659.

The spelling of 1162640 in words is "one million, one hundred sixty-two thousand, six hundred forty".