1231753140 has 36 divisors (see below), whose sum is σ = 3736318404. Its totient is φ = 328467456.

The previous prime is 1231753099. The next prime is 1231753141. The reversal of 1231753140 is 413571321.

1231753140 is a `hidden beast` number, since 123 + 1 + 7 + 531 + 4 + 0 = 666.

1231753140 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 840188196 + 391564944 = 28986^2 + 19788^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231753141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3421357 + ... + 3421716.

Almost surely, 2^1231753140 is an apocalyptic number.

1231753140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231753140 is an abundant number, since it is smaller than the sum of its proper divisors (2504565264).

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

1231753140 is a wasteful number, since it uses less digits than its factorization.

1231753140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843088 (or 6843083 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1231753140 is about 35096.3408349076. The cubic root of 1231753140 is about 1071.9500758754.

The spelling of 1231753140 in words is "one billion, two hundred thirty-one million, seven hundred fifty-three thousand, one hundred forty".