12950991 has 24 divisors (see below), whose sum is σ = 20240064. Its totient is φ = 7948800.

The previous prime is 12950947. The next prime is 12951007. The reversal of 12950991 is 19905921.

It is not a de Polignac number, because 12950991 - 2¹³ = 12942799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12950941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6291 + ... + 8091.

It is an arithmetic number, because the mean of its divisors is an integer number (843336).

Almost surely, 2^12950991 is an apocalyptic number.

12950991 is a deficient number, since it is larger than the sum of its proper divisors (7289073).

12950991 is a wasteful number, since it uses less digits than its factorization.

12950991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 12950991 is about 3598.7485324763. The cubic root of 12950991 is about 234.8376183188.

It can be divided in two parts, 129509 and 91, that added together give a square (129600 = 360²).

The spelling of 12950991 in words is "twelve million, nine hundred fifty thousand, nine hundred ninety-one".