42051765 has 32 divisors (see below), whose sum is σ = 77137920. Its totient is φ = 19162944.

The previous prime is 42051703. The next prime is 42051767. The reversal of 42051765 is 56715024.

It is not a de Polignac number, because 42051765 - 2¹² = 42047669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64672 + ... + 65318.

It is an arithmetic number, because the mean of its divisors is an integer number (2410560).

Almost surely, 2^42051765 is an apocalyptic number.

It is an amenable number.

42051765 is a deficient number, since it is larger than the sum of its proper divisors (35086155).

42051765 is a wasteful number, since it uses less digits than its factorization.

42051765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 42051765 is about 6484.7332250448. The cubic root of 42051765 is about 347.7454126203.

Adding to 42051765 its reverse (56715024), we get a palindrome (98766789).

The spelling of 42051765 in words is "forty-two million, fifty-one thousand, seven hundred sixty-five".