2642217421 has 8 divisors (see below), whose sum is σ = 2649430784. Its totient is φ = 2635014240.

The previous prime is 2642217419. The next prime is 2642217481. The reversal of 2642217421 is 1247122462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2642217421 - 2¹ = 2642217419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642217481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893281 + ... + 896233.

It is an arithmetic number, because the mean of its divisors is an integer number (331178848).

Almost surely, 2^2642217421 is an apocalyptic number.

It is an amenable number.

2642217421 is a deficient number, since it is larger than the sum of its proper divisors (7213363).

2642217421 is a wasteful number, since it uses less digits than its factorization.

2642217421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091.

The product of its digits is 10752, while the sum is 31.

The square root of 2642217421 is about 51402.5040343367. The cubic root of 2642217421 is about 1382.4714901792.

Adding to 2642217421 its reverse (1247122462), we get a palindrome (3889339883).

The spelling of 2642217421 in words is "two billion, six hundred forty-two million, two hundred seventeen thousand, four hundred twenty-one".