1262625121 has 2 divisors, whose sum is σ = 1262625122. Its totient is φ = 1262625120.

The previous prime is 1262625109. The next prime is 1262625149. The reversal of 1262625121 is 1215262621.

It is an a-pointer prime, because the next prime (1262625149) can be obtained adding 1262625121 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004573025 + 258052096 = 31695^2 + 16064^2 .

It is an emirp because it is prime and its reverse (1215262621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1262625121 - 2¹¹ = 1262623073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1262625121.

It is not a weakly prime, because it can be changed into another prime (1262625421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631312560 + 631312561.

It is an arithmetic number, because the mean of its divisors is an integer number (631312561).

Almost surely, 2^1262625121 is an apocalyptic number.

It is an amenable number.

1262625121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1262625121 is an equidigital number, since it uses as much as digits as its factorization.

1262625121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 1262625121 is about 35533.4366618260. The cubic root of 1262625121 is about 1080.8318696620.

Adding to 1262625121 its reverse (1215262621), we get a palindrome (2477887742).

The spelling of 1262625121 in words is "one billion, two hundred sixty-two million, six hundred twenty-five thousand, one hundred twenty-one".