642741200 has 30 divisors (see below), whose sum is σ = 1544186694. Its totient is φ = 257096320.

The previous prime is 642741161. The next prime is 642741223. The reversal of 642741200 is 2147246.

It can be written as a sum of positive squares in 3 ways, for example, as 85969984 + 556771216 = 9272^2 + 23596^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 642741200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 803027 + ... + 803826.

Almost surely, 2^642741200 is an apocalyptic number.

It is an amenable number.

642741200 is an abundant number, since it is smaller than the sum of its proper divisors (901445494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642741200 is a wasteful number, since it uses less digits than its factorization.

642741200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606871 (or 1606860 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 642741200 is about 25352.3411147768. The cubic root of 642741200 is about 863.0024853272.

Adding to 642741200 its reverse (2147246), we get a palindrome (644888446).

The spelling of 642741200 in words is "six hundred forty-two million, seven hundred forty-one thousand, two hundred".