2191454 has 4 divisors (see below), whose sum is σ = 3287184. Its totient is φ = 1095726.

The previous prime is 2191451. The next prime is 2191457. The reversal of 2191454 is 4541912.

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

It is an interprime number because it is at equal distance from previous prime (2191451) and next prime (2191457).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547862 + ... + 547865.

It is an arithmetic number, because the mean of its divisors is an integer number (821796).

2^2191454 is an apocalyptic number.

2191454 is a deficient number, since it is larger than the sum of its proper divisors (1095730).

2191454 is a wasteful number, since it uses less digits than its factorization.

2191454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095729.

The product of its digits is 1440, while the sum is 26.

The square root of 2191454 is about 1480.3560382557. The cubic root of 2191454 is about 129.8905192655.

The spelling of 2191454 in words is "two million, one hundred ninety-one thousand, four hundred fifty-four".