45242191 has 4 divisors (see below), whose sum is σ = 45258984. Its totient is φ = 45225400.

The previous prime is 45242159. The next prime is 45242209. The reversal of 45242191 is 19124254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19124254 = 2 ⋅9562127.

It is a cyclic number.

It is not a de Polignac number, because 45242191 - 2⁵ = 45242159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45242111) 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, 3340 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (11314746).

Almost surely, 2^45242191 is an apocalyptic number.

45242191 is a deficient number, since it is larger than the sum of its proper divisors (16793).

45242191 is a wasteful number, since it uses less digits than its factorization.

45242191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16792.

The product of its digits is 2880, while the sum is 28.

The square root of 45242191 is about 6726.2315600937. The cubic root of 45242191 is about 356.3262983804.

The spelling of 45242191 in words is "forty-five million, two hundred forty-two thousand, one hundred ninety-one".