945491 has 4 divisors (see below), whose sum is σ = 950184. Its totient is φ = 940800.

The previous prime is 945481. The next prime is 945521. The reversal of 945491 is 194549.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194549 = 257 ⋅757.

It is a cyclic number.

It is not a de Polignac number, because 945491 - 2¹⁰ = 944467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945431) 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, 2030 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (237546).

2⁹⁴⁵⁴⁹¹ is an apocalyptic number.

945491 is a deficient number, since it is larger than the sum of its proper divisors (4693).

945491 is a wasteful number, since it uses less digits than its factorization.

945491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692.

The product of its digits is 6480, while the sum is 32.

The square root of 945491 is about 972.3636151153. The cubic root of 945491 is about 98.1489820620.

The spelling of 945491 in words is "nine hundred forty-five thousand, four hundred ninety-one".