1253403013 has 4 divisors (see below), whose sum is σ = 1327132620. Its totient is φ = 1179673408.

The previous prime is 1253402981. The next prime is 1253403017. The reversal of 1253403013 is 3103043521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3103043521 = 8501 ⋅365021.

It can be written as a sum of positive squares in 2 ways, for example, as 1026689764 + 226713249 = 32042^2 + 15057^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253403013 - 2⁵ = 1253402981 is a prime.

It is a super-2 number, since 2×1253403013² = 3142038225994956338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253403017) 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, 36864778 + ... + 36864811.

It is an arithmetic number, because the mean of its divisors is an integer number (331783155).

Almost surely, 2^1253403013 is an apocalyptic number.

It is an amenable number.

1253403013 is a deficient number, since it is larger than the sum of its proper divisors (73729607).

1253403013 is an equidigital number, since it uses as much as digits as its factorization.

1253403013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73729606.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1253403013 is about 35403.4322206195. The cubic root of 1253403013 is about 1078.1940018322.

Adding to 1253403013 its reverse (3103043521), we get a palindrome (4356446534).

The spelling of 1253403013 in words is "one billion, two hundred fifty-three million, four hundred three thousand, thirteen".