1253272189 has 4 divisors (see below), whose sum is σ = 1349677756. Its totient is φ = 1156866624.

The previous prime is 1253272187. The next prime is 1253272199. The reversal of 1253272189 is 9812723521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9812723521 = 3329 ⋅2947649.

It can be written as a sum of positive squares in 2 ways, for example, as 477204025 + 776068164 = 21845^2 + 27858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253272189 - 2¹ = 1253272187 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 (1253272187) 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, 48202764 + ... + 48202789.

It is an arithmetic number, because the mean of its divisors is an integer number (337419439).

Almost surely, 2^1253272189 is an apocalyptic number.

It is an amenable number.

1253272189 is a deficient number, since it is larger than the sum of its proper divisors (96405567).

1253272189 is an equidigital number, since it uses as much as digits as its factorization.

1253272189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96405566.

The product of its digits is 60480, while the sum is 40.

The square root of 1253272189 is about 35401.5845549320. The cubic root of 1253272189 is about 1078.1564883434.

The spelling of 1253272189 in words is "one billion, two hundred fifty-three million, two hundred seventy-two thousand, one hundred eighty-nine".