2145490 has 16 divisors (see below), whose sum is σ = 3901248. Its totient is φ = 849456.

The previous prime is 2145487. The next prime is 2145497. The reversal of 2145490 is 945412.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2145497) 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, 12 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (243828).

2^2145490 is an apocalyptic number.

2145490 is a deficient number, since it is larger than the sum of its proper divisors (1755758).

2145490 is a wasteful number, since it uses less digits than its factorization.

2145490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2145490 is about 1464.7491252771. The cubic root of 2145490 is about 128.9759785410.

The spelling of 2145490 in words is "two million, one hundred forty-five thousand, four hundred ninety".