5421221242 has 4 divisors (see below), whose sum is σ = 8131831866. Its totient is φ = 2710610620.

The previous prime is 5421221237. The next prime is 5421221243. The reversal of 5421221242 is 2421221245.

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., 4407499321 + 1013721921 = 66389^2 + 31839^2 .

It is not an unprimeable number, because it can be changed into a prime (5421221243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1355305309 + ... + 1355305312.

Almost surely, 2^5421221242 is an apocalyptic number.

5421221242 is a deficient number, since it is larger than the sum of its proper divisors (2710610624).

5421221242 is a wasteful number, since it uses less digits than its factorization.

5421221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710610623.

The product of its digits is 2560, while the sum is 25.

The square root of 5421221242 is about 73628.9429640274. The cubic root of 5421221242 is about 1756.7058348074.

Adding to 5421221242 its reverse (2421221245), we get a palindrome (7842442487).

The spelling of 5421221242 in words is "five billion, four hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-two".