1013640 has 32 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 270272.

The previous prime is 1013629. The next prime is 1013641. The reversal of 1013640 is 463101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1013641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4104 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^1013640 is an apocalyptic number.

1013640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013640 is an abundant number, since it is smaller than the sum of its proper divisors (2027640).

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

1013640 is a wasteful number, since it uses less digits than its factorization.

1013640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8461 (or 8457 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1013640 is about 1006.7969010679. The cubic root of 1013640 is about 100.4526149728.

1013640 divided by its sum of digits (15) gives a palindrome (67576).

Adding to 1013640 its reverse (463101), we get a palindrome (1476741).

It can be divided in two parts, 1013 and 640, that added together give a triangular number (1653 = T₅₇).

The spelling of 1013640 in words is "one million, thirteen thousand, six hundred forty".