1572855197 has 2 divisors, whose sum is σ = 1572855198. Its totient is φ = 1572855196.

The previous prime is 1572855191. The next prime is 1572855199. The reversal of 1572855197 is 7915582751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1217381881 + 355473316 = 34891^2 + 18854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1572855197 is a prime.

Together with 1572855199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1572855191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786427598 + 786427599.

It is an arithmetic number, because the mean of its divisors is an integer number (786427599).

Almost surely, 2^1572855197 is an apocalyptic number.

It is an amenable number.

1572855197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572855197 is an equidigital number, since it uses as much as digits as its factorization.

1572855197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 50.

The square root of 1572855197 is about 39659.2384823511. The cubic root of 1572855197 is about 1162.9550097969.

The spelling of 1572855197 in words is "one billion, five hundred seventy-two million, eight hundred fifty-five thousand, one hundred ninety-seven".