1290532791 has 4 divisors (see below), whose sum is σ = 1720710392. Its totient is φ = 860355192.

The previous prime is 1290532757. The next prime is 1290532807. The reversal of 1290532791 is 1972350921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1972350921 = 3 ⋅657450307.

It is not a de Polignac number, because 1290532791 - 2²³ = 1282144183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290531791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215088796 + ... + 215088801.

It is an arithmetic number, because the mean of its divisors is an integer number (430177598).

Almost surely, 2^1290532791 is an apocalyptic number.

1290532791 is a deficient number, since it is larger than the sum of its proper divisors (430177601).

1290532791 is an equidigital number, since it uses as much as digits as its factorization.

1290532791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430177600.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1290532791 is about 35923.9862904996. The cubic root of 1290532791 is about 1088.7370809079.

The spelling of 1290532791 in words is "one billion, two hundred ninety million, five hundred thirty-two thousand, seven hundred ninety-one".