15243401 has 2 divisors, whose sum is σ = 15243402. Its totient is φ = 15243400.

The previous prime is 15243379. The next prime is 15243409. The reversal of 15243401 is 10434251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15217801 + 25600 = 3901^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 15243401 - 2⁶ = 15243337 is a prime.

It is a super-2 number, since 2×15243401² = 464722548093602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15243409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621700 + 7621701.

It is an arithmetic number, because the mean of its divisors is an integer number (7621701).

Almost surely, 2^15243401 is an apocalyptic number.

It is an amenable number.

15243401 is a deficient number, since it is larger than the sum of its proper divisors (1).

15243401 is an equidigital number, since it uses as much as digits as its factorization.

15243401 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 20.

The square root of 15243401 is about 3904.2798311596. The cubic root of 15243401 is about 247.9480087422.

Adding to 15243401 its reverse (10434251), we get a palindrome (25677652).

The spelling of 15243401 in words is "fifteen million, two hundred forty-three thousand, four hundred one".