2115090 has 48 divisors (see below), whose sum is σ = 5593536. Its totient is φ = 554400.

The previous prime is 2115083. The next prime is 2115097. The reversal of 2115090 is 905112.

It is an interprime number because it is at equal distance from previous prime (2115083) and next prime (2115097).

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

It is not an unprimeable number, because it can be changed into a prime (2115097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6225 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (116532).

2^2115090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2796768).

2115090 is an abundant number, since it is smaller than the sum of its proper divisors (3478446).

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

2115090 is a wasteful number, since it uses less digits than its factorization.

2115090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 412 counting only the distinct ones).

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

The square root of 2115090 is about 1454.3348995331. The cubic root of 2115090 is about 128.3639139282.

The spelling of 2115090 in words is "two million, one hundred fifteen thousand, ninety".