42661757 has 4 divisors (see below), whose sum is σ = 44516640. Its totient is φ = 40806876.

The previous prime is 42661747. The next prime is 42661763. The reversal of 42661757 is 75716624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42661757 - 2¹⁰ = 42660733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42661757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42661747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927407 + ... + 927452.

It is an arithmetic number, because the mean of its divisors is an integer number (11129160).

Almost surely, 2^42661757 is an apocalyptic number.

It is an amenable number.

42661757 is a deficient number, since it is larger than the sum of its proper divisors (1854883).

42661757 is a wasteful number, since it uses less digits than its factorization.

42661757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854882.

The product of its digits is 70560, while the sum is 38.

The square root of 42661757 is about 6531.5968185429. The cubic root of 42661757 is about 349.4187822901.

The spelling of 42661757 in words is "forty-two million, six hundred sixty-one thousand, seven hundred fifty-seven".