1310042340 has 72 divisors (see below), whose sum is σ = 4048801848. Its totient is φ = 342750720.

The previous prime is 1310042339. The next prime is 1310042341. The reversal of 1310042340 is 432400131.

It is an interprime number because it is at equal distance from previous prime (1310042339) and next prime (1310042341).

It can be written as a sum of positive squares in 4 ways, for example, as 486467136 + 823575204 = 22056^2 + 28698^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1310042341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59121 + ... + 78200.

It is an arithmetic number, because the mean of its divisors is an integer number (56233359).

Almost surely, 2^1310042340 is an apocalyptic number.

1310042340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1310042340 is an abundant number, since it is smaller than the sum of its proper divisors (2738759508).

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

1310042340 is a wasteful number, since it uses less digits than its factorization.

1310042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137389 (or 137384 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1310042340 is about 36194.5070418151. The cubic root of 1310042340 is about 1094.1959694702.

Adding to 1310042340 its reverse (432400131), we get a palindrome (1742442471).

The spelling of 1310042340 in words is "one billion, three hundred ten million, forty-two thousand, three hundred forty".