642510201 has 16 divisors (see below), whose sum is σ = 870408000. Its totient is φ = 421530048.

The previous prime is 642510173. The next prime is 642510259. The reversal of 642510201 is 102015246.

It is not a de Polignac number, because 642510201 - 2⁷ = 642510073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642510901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42130 + ... + 55316.

It is an arithmetic number, because the mean of its divisors is an integer number (54400500).

Almost surely, 2^642510201 is an apocalyptic number.

It is an amenable number.

642510201 is a deficient number, since it is larger than the sum of its proper divisors (227897799).

642510201 is a wasteful number, since it uses less digits than its factorization.

642510201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13448.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 642510201 is about 25347.7849328102. The cubic root of 642510201 is about 862.8990862203.

Adding to 642510201 its reverse (102015246), we get a palindrome (744525447).

The spelling of 642510201 in words is "six hundred forty-two million, five hundred ten thousand, two hundred one".