2151846 has 40 divisors (see below), whose sum is σ = 4965840. Its totient is φ = 695952.

The previous prime is 2151827. The next prime is 2151847. The reversal of 2151846 is 6481512.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151847) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5815 + ... + 6173.

It is an arithmetic number, because the mean of its divisors is an integer number (124146).

2^2151846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482920).

2151846 is an abundant number, since it is smaller than the sum of its proper divisors (2813994).

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

2151846 is a wasteful number, since it uses less digits than its factorization.

2151846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 401 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2151846 is about 1466.9171755760. The cubic root of 2151846 is about 129.1032164722.

The spelling of 2151846 in words is "two million, one hundred fifty-one thousand, eight hundred forty-six".