2142401242 has 4 divisors (see below), whose sum is σ = 3213601866. Its totient is φ = 1071200620.

The previous prime is 2142401231. The next prime is 2142401243. The reversal of 2142401242 is 2421042412.

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., 2099380761 + 43020481 = 45819^2 + 6559^2 .

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 not an unprimeable number, because it can be changed into a prime (2142401243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535600309 + ... + 535600312.

Almost surely, 2^2142401242 is an apocalyptic number.

2142401242 is a deficient number, since it is larger than the sum of its proper divisors (1071200624).

2142401242 is a wasteful number, since it uses less digits than its factorization.

2142401242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071200623.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 2142401242 is about 46286.0804346188. The cubic root of 2142401242 is about 1289.1405532649.

Adding to 2142401242 its reverse (2421042412), we get a palindrome (4563443654).

The spelling of 2142401242 in words is "two billion, one hundred forty-two million, four hundred one thousand, two hundred forty-two".