1220737 has 8 divisors (see below), whose sum is σ = 1424000. Its totient is φ = 1046052.

The previous prime is 1220729. The next prime is 1220743. The reversal of 1220737 is 7370221.

It is not a de Polignac number, because 1220737 - 2³ = 1220729 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220717) 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, 1437 + ... + 2122.

It is an arithmetic number, because the mean of its divisors is an integer number (178000).

2^1220737 is an apocalyptic number.

It is an amenable number.

1220737 is a deficient number, since it is larger than the sum of its proper divisors (203263).

1220737 is an frugal number, since it uses more digits than its factorization.

1220737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580 (or 3566 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 1220737 is about 1104.8696755726. The cubic root of 1220737 is about 106.8744852522.

Adding to 1220737 its reverse (7370221), we get a palindrome (8590958).

The spelling of 1220737 in words is "one million, two hundred twenty thousand, seven hundred thirty-seven".