42651745 has 8 divisors (see below), whose sum is σ = 51465960. Its totient is φ = 33932160.

The previous prime is 42651727. The next prime is 42651757. The reversal of 42651745 is 54715624.

It can be written as a sum of positive squares in 4 ways, for example, as 6507601 + 36144144 = 2551^2 + 6012^2 .

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

It is not a de Polignac number, because 42651745 - 2⁹ = 42651233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42651745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22660 + ... + 24469.

It is an arithmetic number, because the mean of its divisors is an integer number (6433245).

Almost surely, 2^42651745 is an apocalyptic number.

It is an amenable number.

42651745 is a deficient number, since it is larger than the sum of its proper divisors (8814215).

42651745 is a wasteful number, since it uses less digits than its factorization.

42651745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47315.

The product of its digits is 33600, while the sum is 34.

The square root of 42651745 is about 6530.8303453696. The cubic root of 42651745 is about 349.3914459058.

The spelling of 42651745 in words is "forty-two million, six hundred fifty-one thousand, seven hundred forty-five".