12550981 has 12 divisors (see below), whose sum is σ = 13472388. Its totient is φ = 11689472.

The previous prime is 12550957. The next prime is 12550991. The reversal of 12550981 is 18905521.

It can be written as a sum of positive squares in 6 ways, for example, as 54756 + 12496225 = 234^2 + 3535^2 .

It is not a de Polignac number, because 12550981 - 2⁵ = 12550949 is a prime.

It is a super-2 number, since 2×12550981² = 315054248124722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550931) 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, 39435 + ... + 39751.

It is an arithmetic number, because the mean of its divisors is an integer number (1122699).

Almost surely, 2^12550981 is an apocalyptic number.

It is an amenable number.

12550981 is a deficient number, since it is larger than the sum of its proper divisors (921407).

12550981 is a wasteful number, since it uses less digits than its factorization.

12550981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 12550981 is about 3542.7363717895. The cubic root of 12550981 is about 232.3945241693.

It can be divided in two parts, 12550 and 981, that added together give a palindrome (13531).

The spelling of 12550981 in words is "twelve million, five hundred fifty thousand, nine hundred eighty-one".