1229404176225 has 81 divisors (see below), whose sum is σ = 2219262298617. Its totient is φ = 650581816320.

The previous prime is 1229404176199. The next prime is 1229404176317. The reversal of 1229404176225 is 5226714049221.

The square root of 1229404176225 is 1108785.

It is a perfect power (a square), and thus also a powerful number.

1229404176225 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 4 + 0 + 4 + 17 + 622 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 197725183569 + 1031678992656 = 444663^2 + 1015716^2 .

It is not a de Polignac number, because 1229404176225 - 2⁷ = 1229404176097 is a prime.

It is a super-2 number, since 2×1229404176225² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 3209932384 + ... + 3209932766.

Almost surely, 2^{1229404176225} is an apocalyptic number.

1229404176225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1229404176225 is the 1108785-th square number.

1229404176225 is the 554393-rd centered octagonal number.

It is an amenable number.

1229404176225 is a deficient number, since it is larger than the sum of its proper divisors (989858122392).

1229404176225 is an frugal number, since it uses more digits than its factorization.

1229404176225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 1229404176225 in words is "one trillion, two hundred twenty-nine billion, four hundred four million, one hundred seventy-six thousand, two hundred twenty-five".