642254214 has 64 divisors (see below), whose sum is σ = 1529183232. Its totient is φ = 175996800.

The previous prime is 642254209. The next prime is 642254227. The reversal of 642254214 is 412452246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107424 + ... + 113244.

It is an arithmetic number, because the mean of its divisors is an integer number (23893488).

Almost surely, 2^642254214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642254214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764591616).

642254214 is an abundant number, since it is smaller than the sum of its proper divisors (886929018).

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

642254214 is a wasteful number, since it uses less digits than its factorization.

642254214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941.

The product of its digits is 15360, while the sum is 30.

The square root of 642254214 is about 25342.7349352827. The cubic root of 642254214 is about 862.7844731034.

The spelling of 642254214 in words is "six hundred forty-two million, two hundred fifty-four thousand, two hundred fourteen".