1215690041 has 2 divisors, whose sum is σ = 1215690042. Its totient is φ = 1215690040.

The previous prime is 1215690031. The next prime is 1215690061. The reversal of 1215690041 is 1400965121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609102400 + 606587641 = 24680^2 + 24629^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215690041 - 2¹⁸ = 1215427897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215689986 and 1215690013.

It is not a weakly prime, because it can be changed into another prime (1215690031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607845020 + 607845021.

It is an arithmetic number, because the mean of its divisors is an integer number (607845021).

Almost surely, 2^1215690041 is an apocalyptic number.

It is an amenable number.

1215690041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215690041 is an equidigital number, since it uses as much as digits as its factorization.

1215690041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1215690041 is about 34866.7469231071. The cubic root of 1215690041 is about 1067.2699615291.

The spelling of 1215690041 in words is "one billion, two hundred fifteen million, six hundred ninety thousand, forty-one".