12990445 has 8 divisors (see below), whose sum is σ = 16787736. Its totient is φ = 9592896.

The previous prime is 12990437. The next prime is 12990451. The reversal of 12990445 is 54409921.

It can be written as a sum of positive squares in 4 ways, for example, as 1687401 + 11303044 = 1299^2 + 3362^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12990445 - 2³ = 12990437 is a prime.

It is a super-2 number, since 2×12990445² = 337503322596050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12990445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99862 + ... + 99991.

It is an arithmetic number, because the mean of its divisors is an integer number (2098467).

Almost surely, 2^12990445 is an apocalyptic number.

It is an amenable number.

12990445 is a deficient number, since it is larger than the sum of its proper divisors (3797291).

12990445 is a wasteful number, since it uses less digits than its factorization.

12990445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199871.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12990445 is about 3604.2259918046. The cubic root of 12990445 is about 235.0758469526.

The spelling of 12990445 in words is "twelve million, nine hundred ninety thousand, four hundred forty-five".