2801642 has 4 divisors (see below), whose sum is σ = 4202466. Its totient is φ = 1400820.

The previous prime is 2801641. The next prime is 2801681. The reversal of 2801642 is 2461082.

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., 1934881 + 866761 = 1391^2 + 931^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (2801641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700409 + ... + 700412.

2^2801642 is an apocalyptic number.

2801642 is a deficient number, since it is larger than the sum of its proper divisors (1400824).

2801642 is a wasteful number, since it uses less digits than its factorization.

2801642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400823.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2801642 is about 1673.8106225018. The cubic root of 2801642 is about 140.9735208396.

It can be divided in two parts, 2801 and 642, that added together give a palindrome (3443).

The spelling of 2801642 in words is "two million, eight hundred one thousand, six hundred forty-two".