945561 has 8 divisors (see below), whose sum is σ = 1281664. Its totient is φ = 619920.

The previous prime is 945547. The next prime is 945577. The reversal of 945561 is 165549.

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

It is not a de Polignac number, because 945561 - 2¹⁹ = 421273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945521) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2401 + ... + 2766.

It is an arithmetic number, because the mean of its divisors is an integer number (160208).

2⁹⁴⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

945561 is a deficient number, since it is larger than the sum of its proper divisors (336103).

945561 is a wasteful number, since it uses less digits than its factorization.

945561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231.

The product of its digits is 5400, while the sum is 30.

The square root of 945561 is about 972.3996092142. The cubic root of 945561 is about 98.1514041754.

The spelling of 945561 in words is "nine hundred forty-five thousand, five hundred sixty-one".