2220945 has 8 divisors (see below), whose sum is σ = 3553536. Its totient is φ = 1184496.

The previous prime is 2220941. The next prime is 2220961. The reversal of 2220945 is 5490222.

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

It is not a de Polignac number, because 2220945 - 2² = 2220941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2220941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74017 + ... + 74046.

It is an arithmetic number, because the mean of its divisors is an integer number (444192).

2^2220945 is an apocalyptic number.

It is an amenable number.

2220945 is a deficient number, since it is larger than the sum of its proper divisors (1332591).

2220945 is a wasteful number, since it uses less digits than its factorization.

2220945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148071.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2220945 is about 1490.2835300707. The cubic root of 2220945 is about 130.4705824680.

The spelling of 2220945 in words is "two million, two hundred twenty thousand, nine hundred forty-five".