42745442 has 8 divisors (see below), whose sum is σ = 64996716. Its totient is φ = 21079872.

The previous prime is 42745433. The next prime is 42745453. The reversal of 42745442 is 24454724.

It can be written as a sum of positive squares in 2 ways, for example, as 40462321 + 2283121 = 6361^2 + 1511^2 .

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 = 42745399 and 42745408.

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, 146243 + ... + 146534.

Almost surely, 2^42745442 is an apocalyptic number.

42745442 is a deficient number, since it is larger than the sum of its proper divisors (22251274).

42745442 is a wasteful number, since it uses less digits than its factorization.

42745442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292852.

The product of its digits is 35840, while the sum is 32.

The square root of 42745442 is about 6537.9998470480. Note that the first 3 decimals coincide. The cubic root of 42745442 is about 349.6471055312.

The spelling of 42745442 in words is "forty-two million, seven hundred forty-five thousand, four hundred forty-two".