1076440721 has 2 divisors, whose sum is σ = 1076440722. Its totient is φ = 1076440720.

The previous prime is 1076440637. The next prime is 1076440769. The reversal of 1076440721 is 1270446701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766680721 + 309760000 = 27689^2 + 17600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1076440721 - 2¹⁰ = 1076439697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1076442721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538220360 + 538220361.

It is an arithmetic number, because the mean of its divisors is an integer number (538220361).

Almost surely, 2^1076440721 is an apocalyptic number.

It is an amenable number.

1076440721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1076440721 is an equidigital number, since it uses as much as digits as its factorization.

1076440721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 1076440721 is about 32809.1560543699. The cubic root of 1076440721 is about 1024.8572384158.

The spelling of 1076440721 in words is "one billion, seventy-six million, four hundred forty thousand, seven hundred twenty-one".