1288501325 has 6 divisors (see below), whose sum is σ = 1597741674. Its totient is φ = 1030801040.

The previous prime is 1288501309. The next prime is 1288501337. The reversal of 1288501325 is 5231058821.

It can be written as a sum of positive squares in 3 ways, for example, as 273505444 + 1014995881 = 16538^2 + 31859^2 .

It is not a de Polignac number, because 1288501325 - 2⁴ = 1288501309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25770002 + ... + 25770051.

It is an arithmetic number, because the mean of its divisors is an integer number (266290279).

Almost surely, 2^1288501325 is an apocalyptic number.

It is an amenable number.

1288501325 is a deficient number, since it is larger than the sum of its proper divisors (309240349).

1288501325 is an equidigital number, since it uses as much as digits as its factorization.

1288501325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51540063 (or 51540058 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 1288501325 is about 35895.7006478492. The cubic root of 1288501325 is about 1088.1655097676.

The spelling of 1288501325 in words is "one billion, two hundred eighty-eight million, five hundred one thousand, three hundred twenty-five".