2429821642 has 4 divisors (see below), whose sum is σ = 3644732466. Its totient is φ = 1214910820.

The previous prime is 2429821621. The next prime is 2429821687. The reversal of 2429821642 is 2461289242.

It is a happy number.

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., 2038612801 + 391208841 = 45151^2 + 19779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2429821595 and 2429821604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607455409 + ... + 607455412.

Almost surely, 2^2429821642 is an apocalyptic number.

2429821642 is a deficient number, since it is larger than the sum of its proper divisors (1214910824).

2429821642 is a wasteful number, since it uses less digits than its factorization.

2429821642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214910823.

The product of its digits is 110592, while the sum is 40.

The square root of 2429821642 is about 49293.2210552323. The cubic root of 2429821642 is about 1344.3885303892.

The spelling of 2429821642 in words is "two billion, four hundred twenty-nine million, eight hundred twenty-one thousand, six hundred forty-two".