15432401 has 4 divisors (see below), whose sum is σ = 15441972. Its totient is φ = 15422832.

The previous prime is 15432397. The next prime is 15432407. The reversal of 15432401 is 10423451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10423451 = 73 ⋅142787.

It can be written as a sum of positive squares in 2 ways, for example, as 11730625 + 3701776 = 3425^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 15432401 - 2² = 15432397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15432407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706 + ... + 5811.

It is an arithmetic number, because the mean of its divisors is an integer number (3860493).

Almost surely, 2^15432401 is an apocalyptic number.

It is an amenable number.

15432401 is a deficient number, since it is larger than the sum of its proper divisors (9571).

15432401 is an equidigital number, since it uses as much as digits as its factorization.

15432401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 15432401 is about 3928.4094745838. The cubic root of 15432401 is about 248.9685556762.

Adding to 15432401 its reverse (10423451), we get a palindrome (25855852).

The spelling of 15432401 in words is "fifteen million, four hundred thirty-two thousand, four hundred one".