42478742 has 8 divisors (see below), whose sum is σ = 65773632. Its totient is φ = 20554200.

The previous prime is 42478729. The next prime is 42478757. The reversal of 42478742 is 24787424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42478696 and 42478705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342509 + ... + 342632.

It is an arithmetic number, because the mean of its divisors is an integer number (8221704).

Almost surely, 2^42478742 is an apocalyptic number.

42478742 is a deficient number, since it is larger than the sum of its proper divisors (23294890).

42478742 is a wasteful number, since it uses less digits than its factorization.

42478742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685174.

The product of its digits is 100352, while the sum is 38.

The square root of 42478742 is about 6517.5717870999. The cubic root of 42478742 is about 348.9184079780.

The spelling of 42478742 in words is "forty-two million, four hundred seventy-eight thousand, seven hundred forty-two".