1301220 has 36 divisors (see below), whose sum is σ = 3947580. Its totient is φ = 346944.

The previous prime is 1301219. The next prime is 1301221. The reversal of 1301220 is 221031.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1301219) and next prime (1301221).

It can be written as a sum of positive squares in 2 ways, for example, as 1016064 + 285156 = 1008^2 + 534^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3435 + ... + 3794.

It is an arithmetic number, because the mean of its divisors is an integer number (109655).

2^1301220 is an apocalyptic number.

1301220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301220 is an abundant number, since it is smaller than the sum of its proper divisors (2646360).

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

1301220 is a wasteful number, since it uses less digits than its factorization.

1301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244 (or 7239 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1301220 is about 1140.7103050293. The cubic root of 1301220 is about 109.1734186398.

Adding to 1301220 its reverse (221031), we get a palindrome (1522251).

It can be divided in two parts, 1301 and 220, that added together give a square (1521 = 39²).

The spelling of 1301220 in words is "one million, three hundred one thousand, two hundred twenty".