15036421 has 2 divisors, whose sum is σ = 15036422. Its totient is φ = 15036420.

The previous prime is 15036409. The next prime is 15036431. The reversal of 15036421 is 12463051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 5239521 = 3130^2 + 2289^2 .

It is an emirp because it is prime and its reverse (12463051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15036421 - 2²³ = 6647813 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15036392 and 15036401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15036431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7518210 + 7518211.

It is an arithmetic number, because the mean of its divisors is an integer number (7518211).

Almost surely, 2^15036421 is an apocalyptic number.

It is an amenable number.

15036421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15036421 is an equidigital number, since it uses as much as digits as its factorization.

15036421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 15036421 is about 3877.6824263985. The cubic root of 15036421 is about 246.8206503442.

Adding to 15036421 its reverse (12463051), we get a palindrome (27499472).

The spelling of 15036421 in words is "fifteen million, thirty-six thousand, four hundred twenty-one".