1172256401 has 2 divisors, whose sum is σ = 1172256402. Its totient is φ = 1172256400.

The previous prime is 1172256377. The next prime is 1172256409. The reversal of 1172256401 is 1046522711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726033025 + 446223376 = 26945^2 + 21124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172256401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1172256409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586128200 + 586128201.

It is an arithmetic number, because the mean of its divisors is an integer number (586128201).

Almost surely, 2^1172256401 is an apocalyptic number.

It is an amenable number.

1172256401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172256401 is an equidigital number, since it uses as much as digits as its factorization.

1172256401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1172256401 is about 34238.2301090462. The cubic root of 1172256401 is about 1054.4051964874.

The spelling of 1172256401 in words is "one billion, one hundred seventy-two million, two hundred fifty-six thousand, four hundred one".