1125372731 has 8 divisors (see below), whose sum is σ = 1287180000. Its totient is φ = 963825408.

The previous prime is 1125372707. The next prime is 1125372739. The reversal of 1125372731 is 1372735211.

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

It is not a de Polignac number, because 1125372731 - 2¹⁰ = 1125371707 is a prime.

It is a super-2 number, since 2×1125372731² = 2532927567356796722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125372739) 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, 55616 + ... + 73101.

It is an arithmetic number, because the mean of its divisors is an integer number (160897500).

Almost surely, 2^1125372731 is an apocalyptic number.

1125372731 is a deficient number, since it is larger than the sum of its proper divisors (161807269).

1125372731 is a wasteful number, since it uses less digits than its factorization.

1125372731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129973.

The product of its digits is 8820, while the sum is 32.

The square root of 1125372731 is about 33546.5755480347. The cubic root of 1125372731 is about 1040.1567598392.

The spelling of 1125372731 in words is "one billion, one hundred twenty-five million, three hundred seventy-two thousand, seven hundred thirty-one".