1225551479 has 2 divisors, whose sum is σ = 1225551480. Its totient is φ = 1225551478.

The previous prime is 1225551451. The next prime is 1225551491. The reversal of 1225551479 is 9741555221.

It is a strong prime.

It is an emirp because it is prime and its reverse (9741555221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225551479 - 2²⁴ = 1208774263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225551409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612775739 + 612775740.

It is an arithmetic number, because the mean of its divisors is an integer number (612775740).

Almost surely, 2^1225551479 is an apocalyptic number.

1225551479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225551479 is an equidigital number, since it uses as much as digits as its factorization.

1225551479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 41.

The square root of 1225551479 is about 35007.8773849544. The cubic root of 1225551479 is about 1070.1480212725.

The spelling of 1225551479 in words is "one billion, two hundred twenty-five million, five hundred fifty-one thousand, four hundred seventy-nine".