64280042 has 4 divisors (see below), whose sum is σ = 96420066. Its totient is φ = 32140020.

The previous prime is 64280023. The next prime is 64280089. The reversal of 64280042 is 24008246.

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., 46799281 + 17480761 = 6841^2 + 4181^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64279993 and 64280020.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16070009 + ... + 16070012.

Almost surely, 2^64280042 is an apocalyptic number.

64280042 is a deficient number, since it is larger than the sum of its proper divisors (32140024).

64280042 is a wasteful number, since it uses less digits than its factorization.

64280042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32140023.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 64280042 is about 8017.4835204071. The cubic root of 64280042 is about 400.5825719462.

Adding to 64280042 its reverse (24008246), we get a palindrome (88288288).

The spelling of 64280042 in words is "sixty-four million, two hundred eighty thousand, forty-two".