1290929 has 4 divisors (see below), whose sum is σ = 1366884. Its totient is φ = 1214976.

The previous prime is 1290923. The next prime is 1290937. The reversal of 1290929 is 9290921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 954529 + 336400 = 977^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290929 - 2⁸ = 1290673 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1290895 and 1290904.

It is not an unprimeable number, because it can be changed into a prime (1290923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37952 + ... + 37985.

It is an arithmetic number, because the mean of its divisors is an integer number (341721).

2^1290929 is an apocalyptic number.

It is an amenable number.

1290929 is a deficient number, since it is larger than the sum of its proper divisors (75955).

1290929 is an equidigital number, since it uses as much as digits as its factorization.

1290929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75954.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1290929 is about 1136.1905650022. The cubic root of 1290929 is about 108.8848487942.

The spelling of 1290929 in words is "one million, two hundred ninety thousand, nine hundred twenty-nine".