1253535445 has 4 divisors (see below), whose sum is σ = 1504242540. Its totient is φ = 1002828352.

The previous prime is 1253535419. The next prime is 1253535461. The reversal of 1253535445 is 5445353521.

1253535445 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5445353521 = 17 ⋅320314913.

It can be written as a sum of positive squares in 2 ways, for example, as 934341489 + 319193956 = 30567^2 + 17866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253535445 - 2¹⁹ = 1253011157 is a prime.

It is a super-2 number, since 2×1253535445² = 3142702223742696050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125353540 + ... + 125353549.

It is an arithmetic number, because the mean of its divisors is an integer number (376060635).

Almost surely, 2^1253535445 is an apocalyptic number.

It is an amenable number.

1253535445 is a deficient number, since it is larger than the sum of its proper divisors (250707095).

1253535445 is an equidigital number, since it uses as much as digits as its factorization.

1253535445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250707094.

The product of its digits is 180000, while the sum is 37.

The square root of 1253535445 is about 35405.3024983547. The cubic root of 1253535445 is about 1078.2319737529.

Adding to 1253535445 its reverse (5445353521), we get a palindrome (6698888966).

The spelling of 1253535445 in words is "one billion, two hundred fifty-three million, five hundred thirty-five thousand, four hundred forty-five".