1540313 has 4 divisors (see below), whose sum is σ = 1566480. Its totient is φ = 1514148.

The previous prime is 1540309. The next prime is 1540321. The reversal of 1540313 is 3130451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1540313 - 2² = 1540309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1540291 and 1540300.

It is not an unprimeable number, because it can be changed into a prime (1540813) 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, 12995 + ... + 13112.

It is an arithmetic number, because the mean of its divisors is an integer number (391620).

2^1540313 is an apocalyptic number.

It is an amenable number.

1540313 is a deficient number, since it is larger than the sum of its proper divisors (26167).

1540313 is an equidigital number, since it uses as much as digits as its factorization.

1540313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26166.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1540313 is about 1241.0934694857. The cubic root of 1540313 is about 115.4878581466.

Adding to 1540313 its reverse (3130451), we get a palindrome (4670764).

The spelling of 1540313 in words is "one million, five hundred forty thousand, three hundred thirteen".