2190974 has 4 divisors (see below), whose sum is σ = 3286464. Its totient is φ = 1095486.

The previous prime is 2190971. The next prime is 2190983. The reversal of 2190974 is 4790912.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2190974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547742 + ... + 547745.

It is an arithmetic number, because the mean of its divisors is an integer number (821616).

2^2190974 is an apocalyptic number.

2190974 is a deficient number, since it is larger than the sum of its proper divisors (1095490).

2190974 is a wasteful number, since it uses less digits than its factorization.

2190974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095489.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 2190974 is about 1480.1939062163. The cubic root of 2190974 is about 129.8810351510.

The spelling of 2190974 in words is "two million, one hundred ninety thousand, nine hundred seventy-four".