1242040131 has 12 divisors (see below), whose sum is σ = 1796232880. Its totient is φ = 827022960.

The previous prime is 1242040109. The next prime is 1242040139. The reversal of 1242040131 is 1310402421.

It is not a de Polignac number, because 1242040131 - 2⁹ = 1242039619 is a prime.

It is a super-2 number, since 2×1242040131² = 3085327374028994322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242040139) 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, 75775 + ... + 90696.

Almost surely, 2^1242040131 is an apocalyptic number.

1242040131 is a deficient number, since it is larger than the sum of its proper divisors (554192749).

1242040131 is a wasteful number, since it uses less digits than its factorization.

1242040131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167306 (or 167303 counting only the distinct ones).

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

The square root of 1242040131 is about 35242.5897317436. The cubic root of 1242040131 is about 1074.9259385790.

Adding to 1242040131 its reverse (1310402421), we get a palindrome (2552442552).

The spelling of 1242040131 in words is "one billion, two hundred forty-two million, forty thousand, one hundred thirty-one".