15123361 has 4 divisors (see below), whose sum is σ = 16498224. Its totient is φ = 13748500.

The previous prime is 15123341. The next prime is 15123371. The reversal of 15123361 is 16332151.

It is a happy number.

15123361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16332151 = 11 ⋅1484741.

It is a cyclic number.

It is not a de Polignac number, because 15123361 - 2¹³ = 15115169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15123341) 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, 687415 + ... + 687436.

It is an arithmetic number, because the mean of its divisors is an integer number (4124556).

Almost surely, 2^15123361 is an apocalyptic number.

15123361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15123361 is a deficient number, since it is larger than the sum of its proper divisors (1374863).

15123361 is a wasteful number, since it uses less digits than its factorization.

15123361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374862.

The product of its digits is 540, while the sum is 22.

The square root of 15123361 is about 3888.8765729964. The cubic root of 15123361 is about 247.2954389061.

The spelling of 15123361 in words is "fifteen million, one hundred twenty-three thousand, three hundred sixty-one".