12197455 has 4 divisors (see below), whose sum is σ = 14636952. Its totient is φ = 9757960.

The previous prime is 12197443. The next prime is 12197489. The reversal of 12197455 is 55479121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55479121 = 317 ⋅175013.

It is a de Polignac number, because none of the positive numbers 2^k-12197455 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12197455.

It is a congruent number.

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, 1219741 + ... + 1219750.

It is an arithmetic number, because the mean of its divisors is an integer number (3659238).

Almost surely, 2^12197455 is an apocalyptic number.

12197455 is a deficient number, since it is larger than the sum of its proper divisors (2439497).

12197455 is an equidigital number, since it uses as much as digits as its factorization.

12197455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439496.

The product of its digits is 12600, while the sum is 34.

The square root of 12197455 is about 3492.4855046227. The cubic root of 12197455 is about 230.1917430676.

The spelling of 12197455 in words is "twelve million, one hundred ninety-seven thousand, four hundred fifty-five".