861204045 has 32 divisors (see below), whose sum is σ = 1524039552. Its totient is φ = 412515072.

The previous prime is 861204017. The next prime is 861204079. The reversal of 861204045 is 540402168.

It is not a de Polignac number, because 861204045 - 2²⁴ = 844426829 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 52467 + ... + 66896.

It is an arithmetic number, because the mean of its divisors is an integer number (47626236).

Almost surely, 2^861204045 is an apocalyptic number.

It is an amenable number.

861204045 is a deficient number, since it is larger than the sum of its proper divisors (662835507).

861204045 is a wasteful number, since it uses less digits than its factorization.

861204045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119421.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 861204045 is about 29346.2782137701. The cubic root of 861204045 is about 951.4121362574.

The spelling of 861204045 in words is "eight hundred sixty-one million, two hundred four thousand, forty-five".