642201542 has 8 divisors (see below), whose sum is σ = 963481176. Its totient is φ = 321041152.

The previous prime is 642201541. The next prime is 642201551. The reversal of 642201542 is 245102246.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642201541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14843 + ... + 38790.

It is an arithmetic number, because the mean of its divisors is an integer number (120435147).

Almost surely, 2^642201542 is an apocalyptic number.

642201542 is a deficient number, since it is larger than the sum of its proper divisors (321279634).

642201542 is a wasteful number, since it uses less digits than its factorization.

642201542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59622.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 642201542 is about 25341.6957206893. The cubic root of 642201542 is about 862.7608864793.

Adding to 642201542 its reverse (245102246), we get a palindrome (887303788).

The spelling of 642201542 in words is "six hundred forty-two million, two hundred one thousand, five hundred forty-two".