2151090 has 64 divisors (see below), whose sum is σ = 5944320. Its totient is φ = 552960.

The previous prime is 2151089. The next prime is 2151101. The reversal of 2151090 is 901512.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8242 + ... + 8498.

It is an arithmetic number, because the mean of its divisors is an integer number (92880).

2^2151090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2972160).

2151090 is an abundant number, since it is smaller than the sum of its proper divisors (3793230).

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

2151090 is a wasteful number, since it uses less digits than its factorization.

2151090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2151090 is about 1466.6594696793. The cubic root of 2151090 is about 129.0880955847.

The spelling of 2151090 in words is "two million, one hundred fifty-one thousand, ninety".