1253340545 has 4 divisors (see below), whose sum is σ = 1504008660. Its totient is φ = 1002672432.

The previous prime is 1253340461. The next prime is 1253340551. The reversal of 1253340545 is 5450433521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5450433521 = 13 ⋅419264117.

It can be written as a sum of positive squares in 2 ways, for example, as 835383409 + 417957136 = 28903^2 + 20444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253340545 - 2⁸ = 1253340289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125334050 + ... + 125334059.

It is an arithmetic number, because the mean of its divisors is an integer number (376002165).

Almost surely, 2^1253340545 is an apocalyptic number.

It is an amenable number.

1253340545 is a deficient number, since it is larger than the sum of its proper divisors (250668115).

1253340545 is an equidigital number, since it uses as much as digits as its factorization.

1253340545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250668114.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 1253340545 is about 35402.5499787798. The cubic root of 1253340545 is about 1078.1760895988.

The spelling of 1253340545 in words is "one billion, two hundred fifty-three million, three hundred forty thousand, five hundred forty-five".