1292828645 has 4 divisors (see below), whose sum is σ = 1551394380. Its totient is φ = 1034262912.

The previous prime is 1292828633. The next prime is 1292828653. The reversal of 1292828645 is 5468282921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5468282921 = 67 ⋅81616163.

It can be written as a sum of positive squares in 2 ways, for example, as 340365601 + 952463044 = 18449^2 + 30862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1292828645 - 2²² = 1288634341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1292828645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129282860 + ... + 129282869.

It is an arithmetic number, because the mean of its divisors is an integer number (387848595).

Almost surely, 2^1292828645 is an apocalyptic number.

It is an amenable number.

1292828645 is a deficient number, since it is larger than the sum of its proper divisors (258565735).

1292828645 is an equidigital number, since it uses as much as digits as its factorization.

1292828645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258565734.

The product of its digits is 552960, while the sum is 47.

The square root of 1292828645 is about 35955.9264238873. The cubic root of 1292828645 is about 1089.3823184443.

The spelling of 1292828645 in words is "one billion, two hundred ninety-two million, eight hundred twenty-eight thousand, six hundred forty-five".