15161421 has 16 divisors (see below), whose sum is σ = 22241088. Its totient is φ = 9186320.

The previous prime is 15161381. The next prime is 15161423. The reversal of 15161421 is 12416151.

It is not a de Polignac number, because 15161421 - 2¹⁴ = 15145037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15161423) 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 15 ways as a sum of consecutive naturals, for example, 2095 + ... + 5891.

It is an arithmetic number, because the mean of its divisors is an integer number (1390068).

Almost surely, 2^15161421 is an apocalyptic number.

15161421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15161421 is a deficient number, since it is larger than the sum of its proper divisors (7079667).

15161421 is an equidigital number, since it uses as much as digits as its factorization.

15161421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3811 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 15161421 is about 3893.7669421782. The cubic root of 15161421 is about 247.5027160196.

Adding to 15161421 its reverse (12416151), we get a palindrome (27577572).

The spelling of 15161421 in words is "fifteen million, one hundred sixty-one thousand, four hundred twenty-one".