1252020519 has 18 divisors (see below), whose sum is σ = 1832747280. Its totient is φ = 823493736.

The previous prime is 1252020503. The next prime is 1252020527. The reversal of 1252020519 is 9150202521.

1252020519 is a `hidden beast` number, since 125 + 2 + 0 + 20 + 519 = 666.

It is not a de Polignac number, because 1252020519 - 2⁴ = 1252020503 is a prime.

It is a super-2 number, since 2×1252020519² = 3135110759994058722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1252020492 and 1252020501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252020619) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 942834 + ... + 944160.

Almost surely, 2^1252020519 is an apocalyptic number.

1252020519 is a deficient number, since it is larger than the sum of its proper divisors (580726761).

1252020519 is an frugal number, since it uses more digits than its factorization.

1252020519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739 (or 1409 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1252020519 is about 35383.9019753334. The cubic root of 1252020519 is about 1077.7974427319.

The spelling of 1252020519 in words is "one billion, two hundred fifty-two million, twenty thousand, five hundred nineteen".