1242131 has 4 divisors (see below), whose sum is σ = 1355064. Its totient is φ = 1129200.

The previous prime is 1242121. The next prime is 1242151. The reversal of 1242131 is 1312421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312421 = 11 ⋅119311.

It is a cyclic number.

It is not a de Polignac number, because 1242131 - 2⁶ = 1242067 is a prime.

It is a super-2 number, since 2×1242131² = 3085778842322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56450 + ... + 56471.

It is an arithmetic number, because the mean of its divisors is an integer number (338766).

2^1242131 is an apocalyptic number.

1242131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1242131 is a deficient number, since it is larger than the sum of its proper divisors (112933).

1242131 is a wasteful number, since it uses less digits than its factorization.

1242131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112932.

The product of its digits is 48, while the sum is 14.

The square root of 1242131 is about 1114.5093090683. The cubic root of 1242131 is about 107.4952152188.

Adding to 1242131 its reverse (1312421), we get a palindrome (2554552).

The spelling of 1242131 in words is "one million, two hundred forty-two thousand, one hundred thirty-one".