1275025025 has 6 divisors (see below), whose sum is σ = 1581031062. Its totient is φ = 1020020000.

The previous prime is 1275025021. The next prime is 1275025043. The reversal of 1275025025 is 5205205721.

It can be written as a sum of positive squares in 3 ways, for example, as 301647424 + 973377601 = 17368^2 + 31199^2 .

It is not a de Polignac number, because 1275025025 - 2² = 1275025021 is a prime.

It is a Duffinian number.

1275025025 is a modest number, since divided by 25025 gives 1275 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1275025021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25500476 + ... + 25500525.

It is an arithmetic number, because the mean of its divisors is an integer number (263505177).

Almost surely, 2^1275025025 is an apocalyptic number.

It is an amenable number.

1275025025 is a deficient number, since it is larger than the sum of its proper divisors (306006037).

1275025025 is an equidigital number, since it uses as much as digits as its factorization.

1275025025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51001011 (or 51001006 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 1275025025 is about 35707.4925610858. The cubic root of 1275025025 is about 1084.3585369303.

The spelling of 1275025025 in words is "one billion, two hundred seventy-five million, twenty-five thousand, twenty-five".