1220597237 has 4 divisors (see below), whose sum is σ = 1222940556. Its totient is φ = 1218253920.

The previous prime is 1220597227. The next prime is 1220597239. The reversal of 1220597237 is 7327950221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 676728196 + 543869041 = 26014^2 + 23321^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220597237 - 2⁶ = 1220597173 is a prime.

It is a super-2 number, since 2×1220597237² = 2979715229944068338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220597237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220597239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170878 + ... + 1171919.

It is an arithmetic number, because the mean of its divisors is an integer number (305735139).

Almost surely, 2^1220597237 is an apocalyptic number.

It is an amenable number.

1220597237 is a deficient number, since it is larger than the sum of its proper divisors (2343319).

1220597237 is an equidigital number, since it uses as much as digits as its factorization.

1220597237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343318.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1220597237 is about 34937.0467698688. The cubic root of 1220597237 is about 1068.7040638601.

The spelling of 1220597237 in words is "one billion, two hundred twenty million, five hundred ninety-seven thousand, two hundred thirty-seven".