4156845 has 64 divisors (see below), whose sum is σ = 8570880. Its totient is φ = 1670400.

The previous prime is 4156829. The next prime is 4156847. The reversal of 4156845 is 5486514.

It is not a de Polignac number, because 4156845 - 2⁴ = 4156829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4156847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68115 + ... + 68175.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

Almost surely, 2^4156845 is an apocalyptic number.

It is an amenable number.

4156845 is an abundant number, since it is smaller than the sum of its proper divisors (4414035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4156845 is a wasteful number, since it uses less digits than its factorization.

4156845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146.

The product of its digits is 19200, while the sum is 33.

The square root of 4156845 is about 2038.8342257280. The cubic root of 4156845 is about 160.7883617601.

It can be divided in two parts, 415 and 6845, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 4156845 in words is "four million, one hundred fifty-six thousand, eight hundred forty-five".