12981029 has 4 divisors (see below), whose sum is σ = 13068300. Its totient is φ = 12893760.

The previous prime is 12981011. The next prime is 12981083. The reversal of 12981029 is 92018921.

It is a happy number.

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 6100900 + 6880129 = 2470^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 12981029 - 2¹⁶ = 12915493 is a prime.

It is a super-2 number, since 2×12981029² = 337014227797682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12980986 and 12981004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43412 + ... + 43709.

It is an arithmetic number, because the mean of its divisors is an integer number (3267075).

Almost surely, 2^12981029 is an apocalyptic number.

It is an amenable number.

12981029 is a deficient number, since it is larger than the sum of its proper divisors (87271).

12981029 is an equidigital number, since it uses as much as digits as its factorization.

12981029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87270.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 12981029 is about 3602.9195106191. The cubic root of 12981029 is about 235.0190357298.

The spelling of 12981029 in words is "twelve million, nine hundred eighty-one thousand, twenty-nine".