1220351 has 8 divisors (see below), whose sum is σ = 1401600. Its totient is φ = 1050840.

The previous prime is 1220347. The next prime is 1220353. The reversal of 1220351 is 1530221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220351 - 2² = 1220347 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2711 + ... + 3128.

It is an arithmetic number, because the mean of its divisors is an integer number (175200).

2^1220351 is an apocalyptic number.

1220351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220351 is a deficient number, since it is larger than the sum of its proper divisors (181249).

1220351 is a wasteful number, since it uses less digits than its factorization.

1220351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869.

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

The square root of 1220351 is about 1104.6949805263. The cubic root of 1220351 is about 106.8632194076.

Adding to 1220351 its reverse (1530221), we get a palindrome (2750572).

The spelling of 1220351 in words is "one million, two hundred twenty thousand, three hundred fifty-one".