1351224 has 72 divisors (see below), whose sum is σ = 4268160. Its totient is φ = 385056.

The previous prime is 1351213. The next prime is 1351241. The reversal of 1351224 is 4221531.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a junction number, because it is equal to n+sod(n) for n = 1351197 and 1351206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3337 + ... + 3719.

It is an arithmetic number, because the mean of its divisors is an integer number (59280).

2^1351224 is an apocalyptic number.

1351224 is a gapful number since it is divisible by the number (14) 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 1351224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134080).

1351224 is an abundant number, since it is smaller than the sum of its proper divisors (2916936).

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

1351224 is a wasteful number, since it uses less digits than its factorization.

1351224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 395 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1351224 is about 1162.4216102602. The cubic root of 1351224 is about 110.5543367551.

Adding to 1351224 its reverse (4221531), we get a palindrome (5572755).

The spelling of 1351224 in words is "one million, three hundred fifty-one thousand, two hundred twenty-four".