1125777900 has 72 divisors (see below), whose sum is σ = 3507820624. Its totient is φ = 277113600.

The previous prime is 1125777871. The next prime is 1125777907. The reversal of 1125777900 is 97775211.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1125777907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140431 + ... + 148230.

Almost surely, 2^1125777900 is an apocalyptic number.

1125777900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125777900 is an abundant number, since it is smaller than the sum of its proper divisors (2382042724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1125777900 is a wasteful number, since it uses less digits than its factorization.

1125777900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288691 (or 288684 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 39.

The square root of 1125777900 is about 33552.6139071161. The cubic root of 1125777900 is about 1040.2815743994.

The spelling of 1125777900 in words is "one billion, one hundred twenty-five million, seven hundred seventy-seven thousand, nine hundred".