1125451913 has 2 divisors, whose sum is σ = 1125451914. Its totient is φ = 1125451912.

The previous prime is 1125451907. The next prime is 1125451949. The reversal of 1125451913 is 3191545211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1104033529 + 21418384 = 33227^2 + 4628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125451913 - 2¹⁴ = 1125435529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1125451913.

It is not a weakly prime, because it can be changed into another prime (1125411913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562725956 + 562725957.

It is an arithmetic number, because the mean of its divisors is an integer number (562725957).

Almost surely, 2^1125451913 is an apocalyptic number.

It is an amenable number.

1125451913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125451913 is an equidigital number, since it uses as much as digits as its factorization.

1125451913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The square root of 1125451913 is about 33547.7557073495. The cubic root of 1125451913 is about 1040.1811546490.

The spelling of 1125451913 in words is "one billion, one hundred twenty-five million, four hundred fifty-one thousand, nine hundred thirteen".