12139453 has 4 divisors (see below), whose sum is σ = 12264700. Its totient is φ = 12014208.

The previous prime is 12139447. The next prime is 12139483. The reversal of 12139453 is 35493121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35493121 = 19 ⋅1868059.

It can be written as a sum of positive squares in 2 ways, for example, as 5026564 + 7112889 = 2242^2 + 2667^2 .

It is a cyclic number.

It is not a de Polignac number, because 12139453 - 2²¹ = 10042301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139483) 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, 62478 + ... + 62671.

It is an arithmetic number, because the mean of its divisors is an integer number (3066175).

Almost surely, 2^12139453 is an apocalyptic number.

It is an amenable number.

12139453 is a deficient number, since it is larger than the sum of its proper divisors (125247).

12139453 is an equidigital number, since it uses as much as digits as its factorization.

12139453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125246.

The product of its digits is 3240, while the sum is 28.

The square root of 12139453 is about 3484.1717810694. The cubic root of 12139453 is about 229.8262897563.

The spelling of 12139453 in words is "twelve million, one hundred thirty-nine thousand, four hundred fifty-three".