2191542 has 8 divisors (see below), whose sum is σ = 4383096. Its totient is φ = 730512.

The previous prime is 2191537. The next prime is 2191549. The reversal of 2191542 is 2451912.

It is a sphenic number, since it is the product of 3 distinct primes.

2191542 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191549) 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, 182623 + ... + 182634.

It is an arithmetic number, because the mean of its divisors is an integer number (547887).

2^2191542 is an apocalyptic number.

2191542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2191542 is a wasteful number, since it uses less digits than its factorization.

2191542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365262.

The product of its digits is 720, while the sum is 24.

The square root of 2191542 is about 1480.3857605368. The cubic root of 2191542 is about 129.8922578696.

The spelling of 2191542 in words is "two million, one hundred ninety-one thousand, five hundred forty-two".