1231041402 has 24 divisors (see below), whose sum is σ = 2766044736. Its totient is φ = 410346972.

The previous prime is 1231041401. The next prime is 1231041419. The reversal of 1231041402 is 2041401321.

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 (1231041401) 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, 1266018 + ... + 1266989.

It is an arithmetic number, because the mean of its divisors is an integer number (115251864).

Almost surely, 2^1231041402 is an apocalyptic number.

1231041402 is an abundant number, since it is smaller than the sum of its proper divisors (1535003334).

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

1231041402 is an equidigital number, since it uses as much as digits as its factorization.

1231041402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533024 (or 2533012 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1231041402 is about 35086.1995947124. The cubic root of 1231041402 is about 1071.7435695078.

Adding to 1231041402 its reverse (2041401321), we get a palindrome (3272442723).

The spelling of 1231041402 in words is "one billion, two hundred thirty-one million, forty-one thousand, four hundred two".