1262742253 has 4 divisors (see below), whose sum is σ = 1296870460. Its totient is φ = 1228614048.

The previous prime is 1262742227. The next prime is 1262742259. The reversal of 1262742253 is 3522472621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3522472621 = 401 ⋅8784221.

It can be written as a sum of positive squares in 2 ways, for example, as 1209787524 + 52954729 = 34782^2 + 7277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1262742253 - 2¹³ = 1262734061 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 (1262742259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17064048 + ... + 17064121.

It is an arithmetic number, because the mean of its divisors is an integer number (324217615).

Almost surely, 2^1262742253 is an apocalyptic number.

It is an amenable number.

1262742253 is a deficient number, since it is larger than the sum of its proper divisors (34128207).

1262742253 is an equidigital number, since it uses as much as digits as its factorization.

1262742253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34128206.

The product of its digits is 40320, while the sum is 34.

The square root of 1262742253 is about 35535.0848176841. The cubic root of 1262742253 is about 1080.8652910584.

The spelling of 1262742253 in words is "one billion, two hundred sixty-two million, seven hundred forty-two thousand, two hundred fifty-three".