1315542140 has 48 divisors (see below), whose sum is σ = 3172417920. Its totient is φ = 453199680.

The previous prime is 1315542139. The next prime is 1315542149. The reversal of 1315542140 is 412455131.

It is a super-2 number, since 2×1315542140² = 3461302244231559200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315542149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153182 + ... + 161541.

It is an arithmetic number, because the mean of its divisors is an integer number (66092040).

Almost surely, 2^1315542140 is an apocalyptic number.

1315542140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315542140 is an abundant number, since it is smaller than the sum of its proper divisors (1856875780).

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

1315542140 is a wasteful number, since it uses less digits than its factorization.

1315542140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314762 (or 314760 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1315542140 is about 36270.4030857116. The cubic root of 1315542140 is about 1095.7250440236.

Adding to 1315542140 its reverse (412455131), we get a palindrome (1727997271).

The spelling of 1315542140 in words is "one billion, three hundred fifteen million, five hundred forty-two thousand, one hundred forty".