2155394 has 4 divisors (see below), whose sum is σ = 3233094. Its totient is φ = 1077696.

The previous prime is 2155393. The next prime is 2155397. The reversal of 2155394 is 4935512.

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., 1918225 + 237169 = 1385^2 + 487^2 .

It is not an unprimeable number, because it can be changed into a prime (2155393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538847 + ... + 538850.

2^2155394 is an apocalyptic number.

2155394 is a deficient number, since it is larger than the sum of its proper divisors (1077700).

2155394 is a wasteful number, since it uses less digits than its factorization.

2155394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077699.

The product of its digits is 5400, while the sum is 29.

The square root of 2155394 is about 1468.1260163896. The cubic root of 2155394 is about 129.1741333642.

The spelling of 2155394 in words is "two million, one hundred fifty-five thousand, three hundred ninety-four".