15121230 has 32 divisors (see below), whose sum is σ = 36837504. Its totient is φ = 3971616.

The previous prime is 15121213. The next prime is 15121231. The reversal of 15121230 is 3212151.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1752 + ... + 5771.

It is an arithmetic number, because the mean of its divisors is an integer number (1151172).

Almost surely, 2^15121230 is an apocalyptic number.

15121230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15121230 is an abundant number, since it is smaller than the sum of its proper divisors (21716274).

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

15121230 is a wasteful number, since it uses less digits than its factorization.

15121230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7600.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 15121230 is about 3888.6025767620. The cubic root of 15121230 is about 247.2838230725.

Adding to 15121230 its reverse (3212151), we get a palindrome (18333381).

It can be divided in two parts, 15121 and 230, that added together give a palindrome (15351).

The spelling of 15121230 in words is "fifteen million, one hundred twenty-one thousand, two hundred thirty".