1125415261 has 4 divisors (see below), whose sum is σ = 1125552672. Its totient is φ = 1125277852.

The previous prime is 1125415219. The next prime is 1125415321. The reversal of 1125415261 is 1625145211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1625145211 = 107 ⋅15188273.

It is a cyclic number.

It is not a de Polignac number, because 1125415261 - 2⁹ = 1125414749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125415211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55585 + ... + 73078.

It is an arithmetic number, because the mean of its divisors is an integer number (281388168).

Almost surely, 2^1125415261 is an apocalyptic number.

It is an amenable number.

1125415261 is a deficient number, since it is larger than the sum of its proper divisors (137411).

1125415261 is an equidigital number, since it uses as much as digits as its factorization.

1125415261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137410.

The product of its digits is 2400, while the sum is 28.

The square root of 1125415261 is about 33547.2094368518. The cubic root of 1125415261 is about 1040.1698628490.

The spelling of 1125415261 in words is "one billion, one hundred twenty-five million, four hundred fifteen thousand, two hundred sixty-one".