642220701 has 8 divisors (see below), whose sum is σ = 856926144. Its totient is φ = 427831200.

The previous prime is 642220637. The next prime is 642220703. The reversal of 642220701 is 107022246.

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

It is not a de Polignac number, because 642220701 - 2⁶ = 642220637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642220703) 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, 74200 + ... + 82401.

It is an arithmetic number, because the mean of its divisors is an integer number (107115768).

Almost surely, 2^642220701 is an apocalyptic number.

It is an amenable number.

642220701 is a deficient number, since it is larger than the sum of its proper divisors (214705443).

642220701 is a wasteful number, since it uses less digits than its factorization.

642220701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157971.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 642220701 is about 25342.0737312478. The cubic root of 642220701 is about 862.7694660660.

Adding to 642220701 its reverse (107022246), we get a palindrome (749242947).

The spelling of 642220701 in words is "six hundred forty-two million, two hundred twenty thousand, seven hundred one".