15274421 has 2 divisors, whose sum is σ = 15274422. Its totient is φ = 15274420.

The previous prime is 15274403. The next prime is 15274429. The reversal of 15274421 is 12447251.

15274421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 4351396 = 3305^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 15274421 - 2¹⁴ = 15258037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15274429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7637210 + 7637211.

It is an arithmetic number, because the mean of its divisors is an integer number (7637211).

Almost surely, 2^15274421 is an apocalyptic number.

It is an amenable number.

15274421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15274421 is an equidigital number, since it uses as much as digits as its factorization.

15274421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 26.

The square root of 15274421 is about 3908.2503758076. The cubic root of 15274421 is about 248.1160844422.

The spelling of 15274421 in words is "fifteen million, two hundred seventy-four thousand, four hundred twenty-one".