2145698 has 4 divisors (see below), whose sum is σ = 3218550. Its totient is φ = 1072848.

The previous prime is 2145683. The next prime is 2145707. The reversal of 2145698 is 8965412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2140369 + 5329 = 1463^2 + 73^2 .

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

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536423 + ... + 536426.

2^2145698 is an apocalyptic number.

2145698 is a deficient number, since it is larger than the sum of its proper divisors (1072852).

2145698 is a wasteful number, since it uses less digits than its factorization.

2145698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072851.

The product of its digits is 17280, while the sum is 35.

The square root of 2145698 is about 1464.8201254762. The cubic root of 2145698 is about 128.9801463747.

The spelling of 2145698 in words is "two million, one hundred forty-five thousand, six hundred ninety-eight".