15978041 has 2 divisors, whose sum is σ = 15978042. Its totient is φ = 15978040.

The previous prime is 15978037. The next prime is 15978097. The reversal of 15978041 is 14087951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 137641 = 3980^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 15978041 - 2² = 15978037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15977992 and 15978010.

It is not a weakly prime, because it can be changed into another prime (15978341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7989020 + 7989021.

It is an arithmetic number, because the mean of its divisors is an integer number (7989021).

Almost surely, 2^15978041 is an apocalyptic number.

It is an amenable number.

15978041 is a deficient number, since it is larger than the sum of its proper divisors (1).

15978041 is an equidigital number, since it uses as much as digits as its factorization.

15978041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 15978041 is about 3997.2541825608. The cubic root of 15978041 is about 251.8688796753.

The spelling of 15978041 in words is "fifteen million, nine hundred seventy-eight thousand, forty-one".