1561230 has 96 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 354240.

The previous prime is 1561213. The next prime is 1561243. The reversal of 1561230 is 321651.

It is a super-2 number, since 2×1561230² = 4874878225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 47 ways as a sum of consecutive naturals, for example, 18769 + ... + 18851.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2^1561230 is an apocalyptic number.

1561230 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 1561230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720).

1561230 is an abundant number, since it is smaller than the sum of its proper divisors (3156210).

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

1561230 is a wasteful number, since it uses less digits than its factorization.

1561230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1561230 is about 1249.4918967324. The cubic root of 1561230 is about 116.0082732902.

Adding to 1561230 its reverse (321651), we get a palindrome (1882881).

The spelling of 1561230 in words is "one million, five hundred sixty-one thousand, two hundred thirty".