1225946147 has 2 divisors, whose sum is σ = 1225946148. Its totient is φ = 1225946146.

The previous prime is 1225946107. The next prime is 1225946149. The reversal of 1225946147 is 7416495221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7416495221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225946147 - 2⁶ = 1225946083 is a prime.

Together with 1225946149, 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 (1225946149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612973073 + 612973074.

It is an arithmetic number, because the mean of its divisors is an integer number (612973074).

Almost surely, 2^1225946147 is an apocalyptic number.

1225946147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225946147 is an equidigital number, since it uses as much as digits as its factorization.

1225946147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 1225946147 is about 35013.5137768262. The cubic root of 1225946147 is about 1070.2628832639.

The spelling of 1225946147 in words is "one billion, two hundred twenty-five million, nine hundred forty-six thousand, one hundred forty-seven".