1125742287 has 8 divisors (see below), whose sum is σ = 1501145136. Its totient is φ = 750417152.

The previous prime is 1125742283. The next prime is 1125742357. The reversal of 1125742287 is 7822475211.

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 1125742287 - 2² = 1125742283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125742283) 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, 43423 + ... + 64319.

It is an arithmetic number, because the mean of its divisors is an integer number (187643142).

Almost surely, 2^1125742287 is an apocalyptic number.

1125742287 is a deficient number, since it is larger than the sum of its proper divisors (375402849).

1125742287 is a wasteful number, since it uses less digits than its factorization.

1125742287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38857.

The product of its digits is 62720, while the sum is 39.

The square root of 1125742287 is about 33552.0831991100. The cubic root of 1125742287 is about 1040.2706048176.

The spelling of 1125742287 in words is "one billion, one hundred twenty-five million, seven hundred forty-two thousand, two hundred eighty-seven".