35872561 has 4 divisors (see below), whose sum is σ = 35956224. Its totient is φ = 35788900.

The previous prime is 35872559. The next prime is 35872579. The reversal of 35872561 is 16527853.

35872561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16527853 = 19 ⋅869887.

It is a cyclic number.

It is not a de Polignac number, because 35872561 - 2¹ = 35872559 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 35872561.

It is not an unprimeable number, because it can be changed into a prime (35872511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41185 + ... + 42046.

It is an arithmetic number, because the mean of its divisors is an integer number (8989056).

Almost surely, 2^35872561 is an apocalyptic number.

It is an amenable number.

35872561 is a deficient number, since it is larger than the sum of its proper divisors (83663).

35872561 is an equidigital number, since it uses as much as digits as its factorization.

35872561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83662.

The product of its digits is 50400, while the sum is 37.

The square root of 35872561 is about 5989.3706681086. The cubic root of 35872561 is about 329.8026398720.

The spelling of 35872561 in words is "thirty-five million, eight hundred seventy-two thousand, five hundred sixty-one".