15120823 has 2 divisors, whose sum is σ = 15120824. Its totient is φ = 15120822.

The previous prime is 15120817. The next prime is 15120877. The reversal of 15120823 is 32802151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15120823 - 2¹³ = 15112631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15120794 and 15120803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15120883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560411 + 7560412.

It is an arithmetic number, because the mean of its divisors is an integer number (7560412).

Almost surely, 2^15120823 is an apocalyptic number.

15120823 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120823 is an equidigital number, since it uses as much as digits as its factorization.

15120823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 15120823 is about 3888.5502439855. The cubic root of 15120823 is about 247.2816044386.

Adding to 15120823 its reverse (32802151), we get a palindrome (47922974).

The spelling of 15120823 in words is "fifteen million, one hundred twenty thousand, eight hundred twenty-three".