4190645 has 8 divisors (see below), whose sum is σ = 5202360. Its totient is φ = 3236800.

The previous prime is 4190629. The next prime is 4190663. The reversal of 4190645 is 5460914.

It can be written as a sum of positive squares in 4 ways, for example, as 1825201 + 2365444 = 1351^2 + 1538^2 .

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

It is not a de Polignac number, because 4190645 - 2⁴ = 4190629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14306 + ... + 14595.

It is an arithmetic number, because the mean of its divisors is an integer number (650295).

Almost surely, 2^4190645 is an apocalyptic number.

It is an amenable number.

4190645 is a deficient number, since it is larger than the sum of its proper divisors (1011715).

4190645 is a wasteful number, since it uses less digits than its factorization.

4190645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28935.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 4190645 is about 2047.1064945430. The cubic root of 4190645 is about 161.2229848779. Note that the first 3 decimals are identical.

The spelling of 4190645 in words is "four million, one hundred ninety thousand, six hundred forty-five".