2731642 has 4 divisors (see below), whose sum is σ = 4097466. Its totient is φ = 1365820.

The previous prime is 2731637. The next prime is 2731667. The reversal of 2731642 is 2461372.

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., 2405601 + 326041 = 1551^2 + 571^2 .

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, 682909 + ... + 682912.

2^2731642 is an apocalyptic number.

2731642 is a deficient number, since it is larger than the sum of its proper divisors (1365824).

2731642 is a wasteful number, since it uses less digits than its factorization.

2731642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365823.

The product of its digits is 2016, while the sum is 25.

The square root of 2731642 is about 1652.7679812968. The cubic root of 2731642 is about 139.7895136298.

The spelling of 2731642 in words is "two million, seven hundred thirty-one thousand, six hundred forty-two".