2540194 has 4 divisors (see below), whose sum is σ = 3810294. Its totient is φ = 1270096.

The previous prime is 2540183. The next prime is 2540201. The reversal of 2540194 is 4910452.

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., 1530169 + 1010025 = 1237^2 + 1005^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635047 + ... + 635050.

2^2540194 is an apocalyptic number.

2540194 is a deficient number, since it is larger than the sum of its proper divisors (1270100).

2540194 is a wasteful number, since it uses less digits than its factorization.

2540194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270099.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2540194 is about 1593.7986071019. The cubic root of 2540194 is about 136.4443725800. Note that the first 3 decimals are identical.

The spelling of 2540194 in words is "two million, five hundred forty thousand, one hundred ninety-four".