1255537493 has 4 divisors (see below), whose sum is σ = 1434900000. Its totient is φ = 1076174988.

The previous prime is 1255537489. The next prime is 1255537553. The reversal of 1255537493 is 3947355521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3947355521 = 2707 ⋅1458203.

It is not a de Polignac number, because 1255537493 - 2² = 1255537489 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 (1255537433) by changing a digit.

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, 89681243 + ... + 89681256.

It is an arithmetic number, because the mean of its divisors is an integer number (358725000).

Almost surely, 2^1255537493 is an apocalyptic number.

It is an amenable number.

1255537493 is a deficient number, since it is larger than the sum of its proper divisors (179362507).

1255537493 is an equidigital number, since it uses as much as digits as its factorization.

1255537493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179362506.

The product of its digits is 567000, while the sum is 44.

The square root of 1255537493 is about 35433.5644975213. The cubic root of 1255537493 is about 1078.8056908008.

The spelling of 1255537493 in words is "one billion, two hundred fifty-five million, five hundred thirty-seven thousand, four hundred ninety-three".