1225437013 has 2 divisors, whose sum is σ = 1225437014. Its totient is φ = 1225437012.

The previous prime is 1225436999. The next prime is 1225437071. The reversal of 1225437013 is 3107345221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210552849 + 14884164 = 34793^2 + 3858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225437013 - 2⁵ = 1225436981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225437413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612718506 + 612718507.

It is an arithmetic number, because the mean of its divisors is an integer number (612718507).

Almost surely, 2^1225437013 is an apocalyptic number.

It is an amenable number.

1225437013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225437013 is an equidigital number, since it uses as much as digits as its factorization.

1225437013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1225437013 is about 35006.2424861624. The cubic root of 1225437013 is about 1070.1147031080.

The spelling of 1225437013 in words is "one billion, two hundred twenty-five million, four hundred thirty-seven thousand, thirteen".