1252020239 has 4 divisors (see below), whose sum is σ = 1282557360. Its totient is φ = 1221483120.

The previous prime is 1252020167. The next prime is 1252020251. The reversal of 1252020239 is 9320202521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9320202521 = 7 ⋅1331457503.

It is a cyclic number.

It is not a de Polignac number, because 1252020239 - 2¹⁶ = 1251954703 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 (1252020269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15268499 + ... + 15268580.

It is an arithmetic number, because the mean of its divisors is an integer number (320639340).

Almost surely, 2^1252020239 is an apocalyptic number.

1252020239 is a deficient number, since it is larger than the sum of its proper divisors (30537121).

1252020239 is an equidigital number, since it uses as much as digits as its factorization.

1252020239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30537120.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1252020239 is about 35383.8980187316. The cubic root of 1252020239 is about 1077.7973623863.

The spelling of 1252020239 in words is "one billion, two hundred fifty-two million, twenty thousand, two hundred thirty-nine".