1252786141 has 2 divisors, whose sum is σ = 1252786142. Its totient is φ = 1252786140.

The previous prime is 1252786133. The next prime is 1252786169. The reversal of 1252786141 is 1416872521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978751225 + 274034916 = 31285^2 + 16554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252786141 - 2³ = 1252786133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1252786141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252786121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626393070 + 626393071.

It is an arithmetic number, because the mean of its divisors is an integer number (626393071).

Almost surely, 2^1252786141 is an apocalyptic number.

It is an amenable number.

1252786141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252786141 is an equidigital number, since it uses as much as digits as its factorization.

1252786141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 1252786141 is about 35394.7191117545. The cubic root of 1252786141 is about 1078.0170922972.

The spelling of 1252786141 in words is "one billion, two hundred fifty-two million, seven hundred eighty-six thousand, one hundred forty-one".