2145442 has 32 divisors (see below), whose sum is σ = 3769920. Its totient is φ = 907200.

The previous prime is 2145439. The next prime is 2145443. The reversal of 2145442 is 2445412.

It is a happy number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2145443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21192 + ... + 21292.

It is an arithmetic number, because the mean of its divisors is an integer number (117810).

2^2145442 is an apocalyptic number.

2145442 is a deficient number, since it is larger than the sum of its proper divisors (1624478).

2145442 is a wasteful number, since it uses less digits than its factorization.

2145442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178.

The product of its digits is 1280, while the sum is 22.

The square root of 2145442 is about 1464.7327401270. The cubic root of 2145442 is about 128.9750166950.

The spelling of 2145442 in words is "two million, one hundred forty-five thousand, four hundred forty-two".