1351220 has 24 divisors (see below), whose sum is σ = 3056424. Its totient is φ = 498816.

The previous prime is 1351213. The next prime is 1351241. The reversal of 1351220 is 221531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 1336336 = 122^2 + 1156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1351195 and 1351204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2339 + ... + 2858.

It is an arithmetic number, because the mean of its divisors is an integer number (127351).

2^1351220 is an apocalyptic number.

1351220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351220 is an abundant number, since it is smaller than the sum of its proper divisors (1705204).

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

1351220 is a wasteful number, since it uses less digits than its factorization.

1351220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219 (or 5217 counting only the distinct ones).

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

The square root of 1351220 is about 1162.4198897128. The cubic root of 1351220 is about 110.5542276644.

Adding to 1351220 its reverse (221531), we get a palindrome (1572751).

The spelling of 1351220 in words is "one million, three hundred fifty-one thousand, two hundred twenty".