15123020 has 48 divisors (see below), whose sum is σ = 35326368. Its totient is φ = 5391360.

The previous prime is 15123011. The next prime is 15123023. The reversal of 15123020 is 2032151.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15122986 and 15123004.

It is not an unprimeable number, because it can be changed into a prime (15123023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11012 + ... + 12308.

It is an arithmetic number, because the mean of its divisors is an integer number (735966).

Almost surely, 2^15123020 is an apocalyptic number.

15123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17663184).

15123020 is an abundant number, since it is smaller than the sum of its proper divisors (20203348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15123020 is a wasteful number, since it uses less digits than its factorization.

15123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 15123020 is about 3888.8327297532. The cubic root of 15123020 is about 247.2935802280.

Adding to 15123020 its reverse (2032151), we get a palindrome (17155171).

The spelling of 15123020 in words is "fifteen million, one hundred twenty-three thousand, twenty".