1125725091 has 32 divisors (see below), whose sum is σ = 1677392640. Its totient is φ = 667367424.

The previous prime is 1125725071. The next prime is 1125725101. The reversal of 1125725091 is 1905275211.

It is not a de Polignac number, because 1125725091 - 2¹¹ = 1125723043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1125725071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418236 + ... + 420918.

It is an arithmetic number, because the mean of its divisors is an integer number (52418520).

Almost surely, 2^1125725091 is an apocalyptic number.

1125725091 is a deficient number, since it is larger than the sum of its proper divisors (551667549).

1125725091 is a wasteful number, since it uses less digits than its factorization.

1125725091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155.

The product of its (nonzero) digits is 6300, while the sum is 33.

The square root of 1125725091 is about 33551.8269398255. The cubic root of 1125725091 is about 1040.2653079912.

The spelling of 1125725091 in words is "one billion, one hundred twenty-five million, seven hundred twenty-five thousand, ninety-one".