12158454 has 32 divisors (see below), whose sum is σ = 30318336. Its totient is φ = 3157920.

The previous prime is 12158449. The next prime is 12158501. The reversal of 12158454 is 45485121.

12158454 = T₁₇₆ + T₁₇₇ + ... + T₄₂₇.

It is a congruent number.

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, 12697 + ... + 13620.

It is an arithmetic number, because the mean of its divisors is an integer number (947448).

Almost surely, 2^12158454 is an apocalyptic number.

12158454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12158454 is an abundant number, since it is smaller than the sum of its proper divisors (18159882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12158454 is a wasteful number, since it uses less digits than its factorization.

12158454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26340.

The product of its digits is 6400, while the sum is 30.

The square root of 12158454 is about 3486.8974748335. The cubic root of 12158454 is about 229.9461373556.

It can be divided in two parts, 1215 and 8454, that added together give a palindrome (9669).

The spelling of 12158454 in words is "twelve million, one hundred fifty-eight thousand, four hundred fifty-four".