1262552021 has 2 divisors, whose sum is σ = 1262552022. Its totient is φ = 1262552020.

The previous prime is 1262552003. The next prime is 1262552059. The reversal of 1262552021 is 1202552621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1153349521 + 109202500 = 33961^2 + 10450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1262552021 - 2¹⁰ = 1262550997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1262551021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631276010 + 631276011.

It is an arithmetic number, because the mean of its divisors is an integer number (631276011).

Almost surely, 2^1262552021 is an apocalyptic number.

It is an amenable number.

1262552021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1262552021 is an equidigital number, since it uses as much as digits as its factorization.

1262552021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1262552021 is about 35532.4080382965. The cubic root of 1262552021 is about 1080.8110109148.

It can be divided in two parts, 12625 and 52021, that added together give a palindrome (64646).

The spelling of 1262552021 in words is "one billion, two hundred sixty-two million, five hundred fifty-two thousand, twenty-one".