42276444921 has 12 divisors (see below), whose sum is σ = 61085582740. Its totient is φ = 28175247360.

The previous prime is 42276444907. The next prime is 42276444929. The reversal of 42276444921 is 12944467224.

It can be written as a sum of positive squares in 2 ways, for example, as 154629225 + 42121815696 = 12435^2 + 205236^2 .

It is not a de Polignac number, because 42276444921 - 2¹³ = 42276436729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42276444929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 724456 + ... + 780633.

Almost surely, 2^42276444921 is an apocalyptic number.

It is an amenable number.

42276444921 is a deficient number, since it is larger than the sum of its proper divisors (18809137819).

42276444921 is a wasteful number, since it uses less digits than its factorization.

42276444921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508216 (or 1508213 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 42276444921 in words is "forty-two billion, two hundred seventy-six million, four hundred forty-four thousand, nine hundred twenty-one".