1242134431 has 8 divisors (see below), whose sum is σ = 1254772944. Its totient is φ = 1229515200.

The previous prime is 1242134419. The next prime is 1242134479. The reversal of 1242134431 is 1344312421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242134431 - 2⁷ = 1242134303 is a prime.

It is a super-2 number, since 2×1242134431² = 3085795889351387522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242134396 and 1242134405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242104431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149281 + ... + 157381.

It is an arithmetic number, because the mean of its divisors is an integer number (156846618).

Almost surely, 2^1242134431 is an apocalyptic number.

1242134431 is a deficient number, since it is larger than the sum of its proper divisors (12638513).

1242134431 is a wasteful number, since it uses less digits than its factorization.

1242134431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9641.

The product of its digits is 2304, while the sum is 25.

The square root of 1242134431 is about 35243.9275762506. The cubic root of 1242134431 is about 1074.9531419273.

Adding to 1242134431 its reverse (1344312421), we get a palindrome (2586446852).

The spelling of 1242134431 in words is "one billion, two hundred forty-two million, one hundred thirty-four thousand, four hundred thirty-one".