12651545 has 4 divisors (see below), whose sum is σ = 15181860. Its totient is φ = 10121232.

The previous prime is 12651533. The next prime is 12651559. The reversal of 12651545 is 54515621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54515621 = 29 ⋅1879849.

It can be written as a sum of positive squares in 2 ways, for example, as 9815689 + 2835856 = 3133^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 12651545 - 2⁶ = 12651481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265150 + ... + 1265159.

It is an arithmetic number, because the mean of its divisors is an integer number (3795465).

Almost surely, 2^12651545 is an apocalyptic number.

It is an amenable number.

12651545 is a deficient number, since it is larger than the sum of its proper divisors (2530315).

12651545 is an equidigital number, since it uses as much as digits as its factorization.

12651545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530314.

The product of its digits is 6000, while the sum is 29.

The square root of 12651545 is about 3556.9010388258. The cubic root of 12651545 is about 233.0135562854.

The spelling of 12651545 in words is "twelve million, six hundred fifty-one thousand, five hundred forty-five".