1266354253 has 6 divisors (see below), whose sum is σ = 1272987114. Its totient is φ = 1259755776.

The previous prime is 1266354251. The next prime is 1266354283. The reversal of 1266354253 is 3524536621.

It can be written as a sum of positive squares in 3 ways, for example, as 39463524 + 1226890729 = 6282^2 + 35027^2 .

It is not a de Polignac number, because 1266354253 - 2¹ = 1266354251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266354251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20251 + ... + 54247.

It is an arithmetic number, because the mean of its divisors is an integer number (212164519).

Almost surely, 2^1266354253 is an apocalyptic number.

It is an amenable number.

1266354253 is a deficient number, since it is larger than the sum of its proper divisors (6632861).

1266354253 is an frugal number, since it uses more digits than its factorization.

1266354253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34383 (or 34190 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 1266354253 is about 35585.8715363274. The cubic root of 1266354253 is about 1081.8948938553.

The spelling of 1266354253 in words is "one billion, two hundred sixty-six million, three hundred fifty-four thousand, two hundred fifty-three".