1220307 has 8 divisors (see below), whose sum is σ = 1775040. Its totient is φ = 739560.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220307 is 7030221.

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

It is not a de Polignac number, because 1220307 - 2¹⁵ = 1187539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220309) 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, 18457 + ... + 18522.

It is an arithmetic number, because the mean of its divisors is an integer number (221880).

2^1220307 is an apocalyptic number.

1220307 is a deficient number, since it is larger than the sum of its proper divisors (554733).

1220307 is a wasteful number, since it uses less digits than its factorization.

1220307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36993.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 1220307 is about 1104.6750653473. The cubic root of 1220307 is about 106.8619350672.

Adding to 1220307 its reverse (7030221), we get a palindrome (8250528).

The spelling of 1220307 in words is "one million, two hundred twenty thousand, three hundred seven".