2149898 has 4 divisors (see below), whose sum is σ = 3224850. Its totient is φ = 1074948.

The previous prime is 2149897. The next prime is 2149909. The reversal of 2149898 is 8989412.

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., 2036329 + 113569 = 1427^2 + 337^2 .

It is a super-2 number, since 2×2149898² = 9244122820808, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2149897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537473 + ... + 537476.

2^2149898 is an apocalyptic number.

2149898 is a deficient number, since it is larger than the sum of its proper divisors (1074952).

2149898 is a wasteful number, since it uses less digits than its factorization.

2149898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074951.

The product of its digits is 41472, while the sum is 41.

The square root of 2149898 is about 1466.2530477377. The cubic root of 2149898 is about 129.0642469868.

The spelling of 2149898 in words is "two million, one hundred forty-nine thousand, eight hundred ninety-eight".