2045549 has 4 divisors (see below), whose sum is σ = 2231520. Its totient is φ = 1859580.

The previous prime is 2045543. The next prime is 2045557. The reversal of 2045549 is 9455402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2045549 - 2²⁰ = 996973 is a prime.

It is a super-2 number, since 2×2045549² = 8368541422802, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045543) 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, 92969 + ... + 92990.

It is an arithmetic number, because the mean of its divisors is an integer number (557880).

2^2045549 is an apocalyptic number.

It is an amenable number.

2045549 is a deficient number, since it is larger than the sum of its proper divisors (185971).

2045549 is a wasteful number, since it uses less digits than its factorization.

2045549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185970.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2045549 is about 1430.2269050749. The cubic root of 2045549 is about 126.9414035179.

The spelling of 2045549 in words is "two million, forty-five thousand, five hundred forty-nine".