42550751 has 4 divisors (see below), whose sum is σ = 43133712. Its totient is φ = 41967792.

The previous prime is 42550727. The next prime is 42550763. The reversal of 42550751 is 15705524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42550751 - 2⁶ = 42550687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291371 + ... + 291516.

It is an arithmetic number, because the mean of its divisors is an integer number (10783428).

Almost surely, 2^42550751 is an apocalyptic number.

42550751 is a deficient number, since it is larger than the sum of its proper divisors (582961).

42550751 is an equidigital number, since it uses as much as digits as its factorization.

42550751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582960.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 42550751 is about 6523.0936678849. The cubic root of 42550751 is about 349.1154561999.

The spelling of 42550751 in words is "forty-two million, five hundred fifty thousand, seven hundred fifty-one".