1290747541 has 2 divisors, whose sum is σ = 1290747542. Its totient is φ = 1290747540.

The previous prime is 1290747503. The next prime is 1290747571. The reversal of 1290747541 is 1457470921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1234046641 + 56700900 = 35129^2 + 7530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290747541 - 2¹³ = 1290739349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1290747494 and 1290747503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290747571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645373770 + 645373771.

It is an arithmetic number, because the mean of its divisors is an integer number (645373771).

Almost surely, 2^1290747541 is an apocalyptic number.

It is an amenable number.

1290747541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290747541 is an equidigital number, since it uses as much as digits as its factorization.

1290747541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 1290747541 is about 35926.9751161992. The cubic root of 1290747541 is about 1088.7974676779.

The spelling of 1290747541 in words is "one billion, two hundred ninety million, seven hundred forty-seven thousand, five hundred forty-one".