1231240412 has 12 divisors (see below), whose sum is σ = 2165836176. Its totient is φ = 612430080.

The previous prime is 1231240391. The next prime is 1231240421. The reversal of 1231240412 is 2140421321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796664 + ... + 798207.

It is an arithmetic number, because the mean of its divisors is an integer number (180486348).

Almost surely, 2^1231240412 is an apocalyptic number.

It is an amenable number.

1231240412 is a deficient number, since it is larger than the sum of its proper divisors (934595764).

1231240412 is a wasteful number, since it uses less digits than its factorization.

1231240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595068 (or 1595066 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1231240412 is about 35089.0354954365. The cubic root of 1231240412 is about 1071.8013190400.

Adding to 1231240412 its reverse (2140421321), we get a palindrome (3371661733).

The spelling of 1231240412 in words is "one billion, two hundred thirty-one million, two hundred forty thousand, four hundred twelve".