1261125076 has 24 divisors (see below), whose sum is σ = 2459782080. Its totient is φ = 562234752.

The previous prime is 1261125071. The next prime is 1261125077. The reversal of 1261125076 is 6705211621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261125071) 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, 486760 + ... + 489343.

It is an arithmetic number, because the mean of its divisors is an integer number (102490920).

Almost surely, 2^1261125076 is an apocalyptic number.

It is an amenable number.

1261125076 is a deficient number, since it is larger than the sum of its proper divisors (1198657004).

1261125076 is a wasteful number, since it uses less digits than its factorization.

1261125076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976143 (or 976141 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1261125076 is about 35512.3228753063. The cubic root of 1261125076 is about 1080.4036774001.

Adding to 1261125076 its reverse (6705211621), we get a palindrome (7966336697).

The spelling of 1261125076 in words is "one billion, two hundred sixty-one million, one hundred twenty-five thousand, seventy-six".