1220574137 has 2 divisors, whose sum is σ = 1220574138. Its totient is φ = 1220574136.

The previous prime is 1220574077. The next prime is 1220574139. The reversal of 1220574137 is 7314750221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846577216 + 373996921 = 29096^2 + 19339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220574137 - 2⁶ = 1220574073 is a prime.

Together with 1220574139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1220574139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610287068 + 610287069.

It is an arithmetic number, because the mean of its divisors is an integer number (610287069).

Almost surely, 2^1220574137 is an apocalyptic number.

It is an amenable number.

1220574137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220574137 is an equidigital number, since it uses as much as digits as its factorization.

1220574137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1220574137 is about 34936.7161736761. The cubic root of 1220574137 is about 1068.6973220186.

The spelling of 1220574137 in words is "one billion, two hundred twenty million, five hundred seventy-four thousand, one hundred thirty-seven".