1265572212057 has 48 divisors (see below), whose sum is σ = 1915359421248. Its totient is φ = 835011555840.

The previous prime is 1265572212017. The next prime is 1265572212127. The reversal of 1265572212057 is 7502122755621.

1265572212057 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 572 + 2 + 1 + 20 + 57 = 666.

It is not a de Polignac number, because 1265572212057 - 2¹¹ = 1265572210009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265572212017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18720757 + ... + 18788237.

It is an arithmetic number, because the mean of its divisors is an integer number (39903321276).

Almost surely, 2^{1265572212057} is an apocalyptic number.

It is an amenable number.

1265572212057 is a deficient number, since it is larger than the sum of its proper divisors (649787209191).

1265572212057 is an equidigital number, since it uses as much as digits as its factorization.

1265572212057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68292 (or 68280 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

Adding to 1265572212057 its reverse (7502122755621), we get a palindrome (8767694967678).

The spelling of 1265572212057 in words is "one trillion, two hundred sixty-five billion, five hundred seventy-two million, two hundred twelve thousand, fifty-seven".