1225655357 has 2 divisors, whose sum is σ = 1225655358. Its totient is φ = 1225655356.

The previous prime is 1225655279. The next prime is 1225655383. The reversal of 1225655357 is 7535565221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 696379321 + 529276036 = 26389^2 + 23006^2 .

It is an emirp because it is prime and its reverse (7535565221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225655357 - 2²⁴ = 1208878141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225655657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612827678 + 612827679.

It is an arithmetic number, because the mean of its divisors is an integer number (612827679).

Almost surely, 2^1225655357 is an apocalyptic number.

It is an amenable number.

1225655357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225655357 is an equidigital number, since it uses as much as digits as its factorization.

1225655357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315000, while the sum is 41.

The square root of 1225655357 is about 35009.3609910264. The cubic root of 1225655357 is about 1070.1782557418.

The spelling of 1225655357 in words is "one billion, two hundred twenty-five million, six hundred fifty-five thousand, three hundred fifty-seven".