1225618853 has 2 divisors, whose sum is σ = 1225618854. Its totient is φ = 1225618852.

The previous prime is 1225618847. The next prime is 1225618861. The reversal of 1225618853 is 3588165221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1007554564 + 218064289 = 31742^2 + 14767^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225618853 - 2⁶ = 1225618789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225618853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225618813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612809426 + 612809427.

It is an arithmetic number, because the mean of its divisors is an integer number (612809427).

Almost surely, 2^1225618853 is an apocalyptic number.

It is an amenable number.

1225618853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225618853 is an equidigital number, since it uses as much as digits as its factorization.

1225618853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 41.

The square root of 1225618853 is about 35008.8396408678. The cubic root of 1225618853 is about 1070.1676311741.

The spelling of 1225618853 in words is "one billion, two hundred twenty-five million, six hundred eighteen thousand, eight hundred fifty-three".