45171946 has 4 divisors (see below), whose sum is σ = 67757922. Its totient is φ = 22585972.

The previous prime is 45171923. The next prime is 45171967. The reversal of 45171946 is 64917154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64917154 = 2 ⋅32458577.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 1413721 = 6615^2 + 1189^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11292985 + ... + 11292988.

Almost surely, 2^45171946 is an apocalyptic number.

45171946 is a deficient number, since it is larger than the sum of its proper divisors (22585976).

45171946 is a wasteful number, since it uses less digits than its factorization.

45171946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22585975.

The product of its digits is 30240, while the sum is 37.

The square root of 45171946 is about 6721.0078113331. The cubic root of 45171946 is about 356.1417869339.

It can be divided in two parts, 45 and 171946, that added together give a triangular number (171991 = T₅₈₆).

The spelling of 45171946 in words is "forty-five million, one hundred seventy-one thousand, nine hundred forty-six".