12951505 has 16 divisors (see below), whose sum is σ = 17821440. Its totient is φ = 8851392.

The previous prime is 12951493. The next prime is 12951511. The reversal of 12951505 is 50515921.

12951505 is a nontrivial binomial coefficient, being equal to C(5090, 2).

It is a cyclic number.

It is not a de Polignac number, because 12951505 - 2²³ = 4562897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17452 + ... + 18178.

It is an arithmetic number, because the mean of its divisors is an integer number (1113840).

Almost surely, 2^12951505 is an apocalyptic number.

12951505 is the 5089-th triangular number and also the 2545-th hexagonal number.

12951505 is the 1697-th centered nonagonal number.

It is an amenable number.

12951505 is a deficient number, since it is larger than the sum of its proper divisors (4869935).

12951505 is an equidigital number, since it uses as much as digits as its factorization.

12951505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 12951505 is about 3598.8199454821. The cubic root of 12951505 is about 234.8407250293.

It can be divided in two parts, 12951 and 505, that added together give a square (13456 = 116²).

The spelling of 12951505 in words is "twelve million, nine hundred fifty-one thousand, five hundred five".