642580071 has 12 divisors (see below), whose sum is σ = 996655032. Its totient is φ = 367188528.

The previous prime is 642580069. The next prime is 642580123. The reversal of 642580071 is 170085246.

It is not a de Polignac number, because 642580071 - 2¹ = 642580069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642580051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2185500 + ... + 2185793.

It is an arithmetic number, because the mean of its divisors is an integer number (83054586).

Almost surely, 2^642580071 is an apocalyptic number.

642580071 is a deficient number, since it is larger than the sum of its proper divisors (354074961).

642580071 is a wasteful number, since it uses less digits than its factorization.

642580071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371310 (or 4371303 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 642580071 is about 25349.1631222808. The cubic root of 642580071 is about 862.9303638425.

The spelling of 642580071 in words is "six hundred forty-two million, five hundred eighty thousand, seventy-one".