1243210131 has 12 divisors (see below), whose sum is σ = 1802427120. Its totient is φ = 825724080.

The previous prime is 1243210127. The next prime is 1243210141. The reversal of 1243210131 is 1310123421.

It is not a de Polignac number, because 1243210131 - 2² = 1243210127 is a prime.

It is a super-2 number, since 2×1243210131² = 3091142859642074322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1243210141) 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, 254335 + ... + 259176.

It is an arithmetic number, because the mean of its divisors is an integer number (150202260).

Almost surely, 2^1243210131 is an apocalyptic number.

1243210131 is a deficient number, since it is larger than the sum of its proper divisors (559216989).

1243210131 is a wasteful number, since it uses less digits than its factorization.

1243210131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513786 (or 513783 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1243210131 is about 35259.1850586482. The cubic root of 1243210131 is about 1075.2633588758.

Adding to 1243210131 its reverse (1310123421), we get a palindrome (2553333552).

The spelling of 1243210131 in words is "one billion, two hundred forty-three million, two hundred ten thousand, one hundred thirty-one".