1292793921 has 12 divisors (see below), whose sum is σ = 1868793472. Its totient is φ = 861205176.

The previous prime is 1292793911. The next prime is 1292793941. The reversal of 1292793921 is 1293972921.

It is not a de Polignac number, because 1292793921 - 2⁵ = 1292793889 is a prime.

It is a super-2 number, since 2×1292793921² = 3342632244349108482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1292793911) 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 11 ways as a sum of consecutive naturals, for example, 42181 + ... + 66066.

Almost surely, 2^1292793921 is an apocalyptic number.

It is an amenable number.

1292793921 is a deficient number, since it is larger than the sum of its proper divisors (575999551).

1292793921 is a wasteful number, since it uses less digits than its factorization.

1292793921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109580 (or 109577 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 1292793921 is about 35955.4435517072. The cubic root of 1292793921 is about 1089.3725651408.

The spelling of 1292793921 in words is "one billion, two hundred ninety-two million, seven hundred ninety-three thousand, nine hundred twenty-one".