1290516265 has 16 divisors (see below), whose sum is σ = 1571504256. Its totient is φ = 1017187200.

The previous prime is 1290516247. The next prime is 1290516277. The reversal of 1290516265 is 5626150921.

It is not a de Polignac number, because 1290516265 - 2¹⁷ = 1290385193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667350 + ... + 669280.

It is an arithmetic number, because the mean of its divisors is an integer number (98219016).

Almost surely, 2^1290516265 is an apocalyptic number.

It is an amenable number.

1290516265 is a deficient number, since it is larger than the sum of its proper divisors (280987991).

1290516265 is a wasteful number, since it uses less digits than its factorization.

1290516265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1290516265 is about 35923.7562763139. The cubic root of 1290516265 is about 1088.7324335907.

The spelling of 1290516265 in words is "one billion, two hundred ninety million, five hundred sixteen thousand, two hundred sixty-five".