2145542 has 16 divisors (see below), whose sum is σ = 3697152. Its totient is φ = 914760.

The previous prime is 2145529. The next prime is 2145547. The reversal of 2145542 is 2455412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4403 + ... + 4865.

It is an arithmetic number, because the mean of its divisors is an integer number (231072).

2^2145542 is an apocalyptic number.

2145542 is a deficient number, since it is larger than the sum of its proper divisors (1551610).

2145542 is a wasteful number, since it uses less digits than its factorization.

2145542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its digits is 1600, while the sum is 23.

The square root of 2145542 is about 1464.7668756495. The cubic root of 2145542 is about 128.9770205247.

The spelling of 2145542 in words is "two million, one hundred forty-five thousand, five hundred forty-two".