1252423223981 has 2 divisors, whose sum is σ = 1252423223982. Its totient is φ = 1252423223980.

The previous prime is 1252423223963. The next prime is 1252423224131. The reversal of 1252423223981 is 1893223242521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 691377283081 + 561045940900 = 831491^2 + 749030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252423223981 - 2⁶ = 1252423223917 is a prime.

It is a super-2 number, since 2×1252423223981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252423213981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626211611990 + 626211611991.

It is an arithmetic number, because the mean of its divisors is an integer number (626211611991).

Almost surely, 2^{1252423223981} is an apocalyptic number.

It is an amenable number.

1252423223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252423223981 is an equidigital number, since it uses as much as digits as its factorization.

1252423223981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The spelling of 1252423223981 in words is "one trillion, two hundred fifty-two billion, four hundred twenty-three million, two hundred twenty-three thousand, nine hundred eighty-one".