1292921 has 4 divisors (see below), whose sum is σ = 1477632. Its totient is φ = 1108212.

The previous prime is 1292887. The next prime is 1292927.

It is a happy number.

1292921 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1292921 - 2⁶ = 1292857 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1292927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92345 + ... + 92358.

It is an arithmetic number, because the mean of its divisors is an integer number (369408).

2^1292921 is an apocalyptic number.

It is an amenable number.

1292921 is a deficient number, since it is larger than the sum of its proper divisors (184711).

1292921 is an equidigital number, since it uses as much as digits as its factorization.

1292921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184710.

The product of its digits is 648, while the sum is 26.

The square root of 1292921 is about 1137.0668406035. The cubic root of 1292921 is about 108.9408258337.

The spelling of 1292921 in words is "one million, two hundred ninety-two thousand, nine hundred twenty-one".