1231301040 has 40 divisors (see below), whose sum is σ = 3817033968. Its totient is φ = 328346880.

The previous prime is 1231301033. The next prime is 1231301047. The reversal of 1231301040 is 401031321.

It is an interprime number because it is at equal distance from previous prime (1231301033) and next prime (1231301047).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1231301040² = 3032204502210163200, which contains 22 as substring.

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 (1231301047) 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, 2564971 + ... + 2565450.

Almost surely, 2^1231301040 is an apocalyptic number.

1231301040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231301040 is an abundant number, since it is smaller than the sum of its proper divisors (2585732928).

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

1231301040 is a wasteful number, since it uses less digits than its factorization.

1231301040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130437 (or 5130431 counting only the distinct ones).

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

The square root of 1231301040 is about 35089.8994013947. The cubic root of 1231301040 is about 1071.8189110833.

Adding to 1231301040 its reverse (401031321), we get a palindrome (1632332361).

The spelling of 1231301040 in words is "one billion, two hundred thirty-one million, three hundred one thousand, forty".