1225151243 has 2 divisors, whose sum is σ = 1225151244. Its totient is φ = 1225151242.

The previous prime is 1225151219. The next prime is 1225151251. The reversal of 1225151243 is 3421515221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3421515221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225151243 - 2⁸ = 1225150987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1225151203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612575621 + 612575622.

It is an arithmetic number, because the mean of its divisors is an integer number (612575622).

Almost surely, 2^1225151243 is an apocalyptic number.

1225151243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225151243 is an equidigital number, since it uses as much as digits as its factorization.

1225151243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 1225151243 is about 35002.1605476005. The cubic root of 1225151243 is about 1070.0315136146.

Adding to 1225151243 its reverse (3421515221), we get a palindrome (4646666464).

The spelling of 1225151243 in words is "one billion, two hundred twenty-five million, one hundred fifty-one thousand, two hundred forty-three".