1072703521 has 2 divisors, whose sum is σ = 1072703522. Its totient is φ = 1072703520.

The previous prime is 1072703507. The next prime is 1072703531. The reversal of 1072703521 is 1253072701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1053911296 + 18792225 = 32464^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1072703521 - 2⁷ = 1072703393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1072703521.

It is not a weakly prime, because it can be changed into another prime (1072703531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536351760 + 536351761.

It is an arithmetic number, because the mean of its divisors is an integer number (536351761).

Almost surely, 2^1072703521 is an apocalyptic number.

It is an amenable number.

1072703521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072703521 is an equidigital number, since it uses as much as digits as its factorization.

1072703521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 1072703521 is about 32752.1529216020. The cubic root of 1072703521 is about 1023.6698259170.

The spelling of 1072703521 in words is "one billion, seventy-two million, seven hundred three thousand, five hundred twenty-one".