1291425051 has 16 divisors (see below), whose sum is σ = 1986280704. Its totient is φ = 731059104.

The previous prime is 1291425017. The next prime is 1291425127. The reversal of 1291425051 is 1505241921.

It is not a de Polignac number, because 1291425051 - 2⁶ = 1291424987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1291415051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285120 + ... + 289613.

It is an arithmetic number, because the mean of its divisors is an integer number (124142544).

Almost surely, 2^1291425051 is an apocalyptic number.

1291425051 is a deficient number, since it is larger than the sum of its proper divisors (694855653).

1291425051 is a wasteful number, since it uses less digits than its factorization.

1291425051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574850.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1291425051 is about 35936.4028667311. The cubic root of 1291425051 is about 1088.9879366682.

Adding to 1291425051 its reverse (1505241921), we get a palindrome (2796666972).

The spelling of 1291425051 in words is "one billion, two hundred ninety-one million, four hundred twenty-five thousand, fifty-one".