1252776276421 has 2 divisors, whose sum is σ = 1252776276422. Its totient is φ = 1252776276420.

The previous prime is 1252776276379. The next prime is 1252776276467. The reversal of 1252776276421 is 1246726772521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1176326791396 + 76449485025 = 1084586^2 + 276495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252776276421 - 2¹⁹ = 1252775752133 is a prime.

It is a super-3 number, since 3×1252776276421³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252776276121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626388138210 + 626388138211.

It is an arithmetic number, because the mean of its divisors is an integer number (626388138211).

Almost surely, 2^{1252776276421} is an apocalyptic number.

It is an amenable number.

1252776276421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252776276421 is an equidigital number, since it uses as much as digits as its factorization.

1252776276421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 52.

The spelling of 1252776276421 in words is "one trillion, two hundred fifty-two billion, seven hundred seventy-six million, two hundred seventy-six thousand, four hundred twenty-one".