15068421 has 6 divisors (see below), whose sum is σ = 21765510. Its totient is φ = 10045608.

The previous prime is 15068419. The next prime is 15068453. The reversal of 15068421 is 12486051.

It can be written as a sum of positive squares in only one way, i.e., 8381025 + 6687396 = 2895^2 + 2586^2 .

It is not a de Polignac number, because 15068421 - 2¹ = 15068419 is a prime.

It is a super-2 number, since 2×15068421² = 454114622866482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15068411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 837126 + ... + 837143.

It is an arithmetic number, because the mean of its divisors is an integer number (3627585).

Almost surely, 2^15068421 is an apocalyptic number.

It is an amenable number.

15068421 is a deficient number, since it is larger than the sum of its proper divisors (6697089).

15068421 is a wasteful number, since it uses less digits than its factorization.

15068421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674275 (or 1674272 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 15068421 is about 3881.8064093924. The cubic root of 15068421 is about 246.9956180551.

The spelling of 15068421 in words is "fifteen million, sixty-eight thousand, four hundred twenty-one".