1531230 has 32 divisors (see below), whose sum is σ = 3763584. Its totient is φ = 398496.

The previous prime is 1531217. The next prime is 1531253. The reversal of 1531230 is 321351.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (117612).

2^1531230 is an apocalyptic number.

1531230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1531230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881792).

1531230 is an abundant number, since it is smaller than the sum of its proper divisors (2232354).

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

1531230 is a wasteful number, since it uses less digits than its factorization.

1531230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1531230 is about 1237.4287858297. The cubic root of 1531230 is about 115.2604054831.

Adding to 1531230 its reverse (321351), we get a palindrome (1852581).

The spelling of 1531230 in words is "one million, five hundred thirty-one thousand, two hundred thirty".