2421742 has 4 divisors (see below), whose sum is σ = 3632616. Its totient is φ = 1210870.

The previous prime is 2421737. The next prime is 2421743. The reversal of 2421742 is 2471242.

It is a happy number.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605434 + ... + 605437.

It is an arithmetic number, because the mean of its divisors is an integer number (908154).

2^2421742 is an apocalyptic number.

2421742 is a deficient number, since it is larger than the sum of its proper divisors (1210874).

2421742 is a wasteful number, since it uses less digits than its factorization.

2421742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210873.

The product of its digits is 896, while the sum is 22.

The square root of 2421742 is about 1556.1947178936. The cubic root of 2421742 is about 134.2896755606.

Adding to 2421742 its reverse (2471242), we get a palindrome (4892984).

The spelling of 2421742 in words is "two million, four hundred twenty-one thousand, seven hundred forty-two".