2145842 has 8 divisors (see below), whose sum is σ = 3408156. Its totient is φ = 1009792.

The previous prime is 2145839. The next prime is 2145853. The reversal of 2145842 is 2485412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2128681 + 17161 = 1459^2 + 131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31523 + ... + 31590.

2^2145842 is an apocalyptic number.

2145842 is a deficient number, since it is larger than the sum of its proper divisors (1262314).

2145842 is a wasteful number, since it uses less digits than its factorization.

2145842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63132.

The product of its digits is 2560, while the sum is 26.

The square root of 2145842 is about 1464.8692774442. The cubic root of 2145842 is about 128.9830316403.

The spelling of 2145842 in words is "two million, one hundred forty-five thousand, eight hundred forty-two".