1041019921 has 2 divisors, whose sum is σ = 1041019922. Its totient is φ = 1041019920.

The previous prime is 1041019919. The next prime is 1041019933. The reversal of 1041019921 is 1299101401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835499025 + 205520896 = 28905^2 + 14336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1041019921 - 2¹ = 1041019919 is a prime.

Together with 1041019919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1041019921.

It is not a weakly prime, because it can be changed into another prime (1041019321) 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 as a sum of consecutive naturals, namely, 520509960 + 520509961.

It is an arithmetic number, because the mean of its divisors is an integer number (520509961).

Almost surely, 2^1041019921 is an apocalyptic number.

It is an amenable number.

1041019921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1041019921 is an equidigital number, since it uses as much as digits as its factorization.

1041019921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1041019921 is about 32264.8403219356. The cubic root of 1041019921 is about 1013.4904951467.

The spelling of 1041019921 in words is "one billion, forty-one million, nineteen thousand, nine hundred twenty-one".