1252603871 has 4 divisors (see below), whose sum is σ = 1253796744. Its totient is φ = 1251411000.

The previous prime is 1252603867. The next prime is 1252603903. The reversal of 1252603871 is 1783062521.

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: 1783062521 = 1693 ⋅1053197.

It is a cyclic number.

It is not a de Polignac number, because 1252603871 - 2² = 1252603867 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 (1252603801) 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, 594860 + ... + 596961.

It is an arithmetic number, because the mean of its divisors is an integer number (313449186).

Almost surely, 2^1252603871 is an apocalyptic number.

1252603871 is a deficient number, since it is larger than the sum of its proper divisors (1192873).

1252603871 is a wasteful number, since it uses less digits than its factorization.

1252603871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192872.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1252603871 is about 35392.1441989603. The cubic root of 1252603871 is about 1077.9648089108.

The spelling of 1252603871 in words is "one billion, two hundred fifty-two million, six hundred three thousand, eight hundred seventy-one".