2158454 has 4 divisors (see below), whose sum is σ = 3237684. Its totient is φ = 1079226.

The previous prime is 2158447. The next prime is 2158459. The reversal of 2158454 is 4548512.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539612 + ... + 539615.

It is an arithmetic number, because the mean of its divisors is an integer number (809421).

2^2158454 is an apocalyptic number.

2158454 is a deficient number, since it is larger than the sum of its proper divisors (1079230).

2158454 is a wasteful number, since it uses less digits than its factorization.

2158454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079229.

The product of its digits is 6400, while the sum is 29.

The square root of 2158454 is about 1469.1677916426. The cubic root of 2158454 is about 129.2352337075.

The spelling of 2158454 in words is "two million, one hundred fifty-eight thousand, four hundred fifty-four".