1242132531 has 8 divisors (see below), whose sum is σ = 1660923600. Its totient is φ = 825714912.

The previous prime is 1242132527. The next prime is 1242132533. The reversal of 1242132531 is 1352312421.

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

It is not a de Polignac number, because 1242132531 - 2² = 1242132527 is a prime.

It is a super-2 number, since 2×1242132531² = 3085786449136931922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242132533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592140 + ... + 594233.

It is an arithmetic number, because the mean of its divisors is an integer number (207615450).

Almost surely, 2^1242132531 is an apocalyptic number.

1242132531 is a deficient number, since it is larger than the sum of its proper divisors (418791069).

1242132531 is a wasteful number, since it uses less digits than its factorization.

1242132531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186725.

The product of its digits is 1440, while the sum is 24.

The square root of 1242132531 is about 35243.9006212423. The cubic root of 1242132531 is about 1074.9525938352.

Adding to 1242132531 its reverse (1352312421), we get a palindrome (2594444952).

The spelling of 1242132531 in words is "one billion, two hundred forty-two million, one hundred thirty-two thousand, five hundred thirty-one".