4098645 has 12 divisors (see below), whose sum is σ = 7104396. Its totient is φ = 2185920.

The previous prime is 4098641. The next prime is 4098659. The reversal of 4098645 is 5468904.

4098645 is a `hidden beast` number, since 4 + 0 + 9 + 8 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2268036 + 1830609 = 1506^2 + 1353^2 .

It is not a de Polignac number, because 4098645 - 2² = 4098641 is a prime.

It is an Ulam number.

4098645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4098641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45496 + ... + 45585.

It is an arithmetic number, because the mean of its divisors is an integer number (592033).

Almost surely, 2^4098645 is an apocalyptic number.

4098645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4098645 is a deficient number, since it is larger than the sum of its proper divisors (3005751).

4098645 is a wasteful number, since it uses less digits than its factorization.

4098645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91092 (or 91089 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 4098645 is about 2024.5110520815. The cubic root of 4098645 is about 160.0344326936.

The spelling of 4098645 in words is "four million, ninety-eight thousand, six hundred forty-five".