12901690 has 8 divisors (see below), whose sum is σ = 23223060. Its totient is φ = 5160672.

The previous prime is 12901663. The next prime is 12901699. The reversal of 12901690 is 9610921.

It can be written as a sum of positive squares in 2 ways, for example, as 11336689 + 1565001 = 3367^2 + 1251^2 .

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

It is a super-2 number, since 2×12901690² = 332907209712200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12901699) 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, 645075 + ... + 645094.

Almost surely, 2^12901690 is an apocalyptic number.

12901690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12901690 is a deficient number, since it is larger than the sum of its proper divisors (10321370).

12901690 is a wasteful number, since it uses less digits than its factorization.

12901690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290176.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 12901690 is about 3591.8922589632. The cubic root of 12901690 is about 234.5392511466.

The spelling of 12901690 in words is "twelve million, nine hundred one thousand, six hundred ninety".