1125504742431 has 4 divisors (see below), whose sum is σ = 1500672989912. Its totient is φ = 750336494952.

The previous prime is 1125504742393. The next prime is 1125504742451. The reversal of 1125504742431 is 1342474055211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1125504742431 - 2⁹ = 1125504741919 is a prime.

It is a super-2 number, since 2×1125504742431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125504742431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125504742451) 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, 187584123736 + ... + 187584123741.

It is an arithmetic number, because the mean of its divisors is an integer number (375168247478).

Almost surely, 2^{1125504742431} is an apocalyptic number.

1125504742431 is a deficient number, since it is larger than the sum of its proper divisors (375168247481).

1125504742431 is an equidigital number, since it uses as much as digits as its factorization.

1125504742431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375168247480.

The product of its (nonzero) digits is 134400, while the sum is 39.

Adding to 1125504742431 its reverse (1342474055211), we get a palindrome (2467978797642).

The spelling of 1125504742431 in words is "one trillion, one hundred twenty-five billion, five hundred four million, seven hundred forty-two thousand, four hundred thirty-one".