2775742 has 4 divisors (see below), whose sum is σ = 4163616. Its totient is φ = 1387870.

The previous prime is 2775739. The next prime is 2775761. The reversal of 2775742 is 2475772.

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

It is a junction number, because it is equal to n+sod(n) for n = 2775698 and 2775707.

It is a congruent number.

It is an unprimeable number.

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, 693934 + ... + 693937.

It is an arithmetic number, because the mean of its divisors is an integer number (1040904).

2^2775742 is an apocalyptic number.

2775742 is a deficient number, since it is larger than the sum of its proper divisors (1387874).

2775742 is a wasteful number, since it uses less digits than its factorization.

2775742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387873.

The product of its digits is 27440, while the sum is 34.

The square root of 2775742 is about 1666.0558213937. The cubic root of 2775742 is about 140.5377616614.

The spelling of 2775742 in words is "two million, seven hundred seventy-five thousand, seven hundred forty-two".