860420642 has 4 divisors (see below), whose sum is σ = 1290630966. Its totient is φ = 430210320.

The previous prime is 860420641. The next prime is 860420651. The reversal of 860420642 is 246024068.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 609546721 + 250873921 = 24689^2 + 15839^2 .

It is a super-3 number, since 3×860420642³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 860420599 and 860420608.

It is not an unprimeable number, because it can be changed into a prime (860420641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215105159 + ... + 215105162.

Almost surely, 2^860420642 is an apocalyptic number.

860420642 is a deficient number, since it is larger than the sum of its proper divisors (430210324).

860420642 is a wasteful number, since it uses less digits than its factorization.

860420642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430210323.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 860420642 is about 29332.9276070426. The cubic root of 860420642 is about 951.1235615028.

The spelling of 860420642 in words is "eight hundred sixty million, four hundred twenty thousand, six hundred forty-two".