2145492 has 36 divisors (see below), whose sum is σ = 5517876. Its totient is φ = 702720.

The previous prime is 2145487. The next prime is 2145497. The reversal of 2145492 is 2945412.

It is an interprime number because it is at equal distance from previous prime (2145487) and next prime (2145497).

It can be written as a sum of positive squares in 2 ways, for example, as 992016 + 1153476 = 996^2 + 1074^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145497) 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, 1708 + ... + 2684.

2^2145492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2758938).

2145492 is an abundant number, since it is smaller than the sum of its proper divisors (3372384).

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

2145492 is a wasteful number, since it uses less digits than its factorization.

2145492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1043 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2145492 is about 1464.7498079877. The cubic root of 2145492 is about 128.9760186176.

The spelling of 2145492 in words is "two million, one hundred forty-five thousand, four hundred ninety-two".