1255440353 has 4 divisors (see below), whose sum is σ = 1255940868. Its totient is φ = 1254939840.

The previous prime is 1255440343. The next prime is 1255440367. The reversal of 1255440353 is 3530445521.

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: 3530445521 = 10159 ⋅347519.

It can be written as a sum of positive squares in 2 ways, for example, as 371448529 + 883991824 = 19273^2 + 29732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255440353 - 2⁴ = 1255440337 is a prime.

It is a super-2 number, since 2×1255440353² = 3152260959881529218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255440313) 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, 246476 + ... + 251517.

It is an arithmetic number, because the mean of its divisors is an integer number (313985217).

Almost surely, 2^1255440353 is an apocalyptic number.

It is an amenable number.

1255440353 is a deficient number, since it is larger than the sum of its proper divisors (500515).

1255440353 is an equidigital number, since it uses as much as digits as its factorization.

1255440353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500514.

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

The square root of 1255440353 is about 35432.1937367700. The cubic root of 1255440353 is about 1078.7778679525. Note that the first 3 decimals are identical.

Adding to 1255440353 its reverse (3530445521), we get a palindrome (4785885874).

The spelling of 1255440353 in words is "one billion, two hundred fifty-five million, four hundred forty thousand, three hundred fifty-three".