1052139869 has 8 divisors (see below), whose sum is σ = 1148025312. Its totient is φ = 956293840.

The previous prime is 1052139863. The next prime is 1052139871. The reversal of 1052139869 is 9689312501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1052139869 - 2²⁸ = 783704413 is a prime.

It is a super-2 number, since 2×1052139869² = 2213996607878674322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052139863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90122 + ... + 101124.

It is an arithmetic number, because the mean of its divisors is an integer number (143503164).

Almost surely, 2^1052139869 is an apocalyptic number.

It is an amenable number.

1052139869 is a deficient number, since it is larger than the sum of its proper divisors (95885443).

1052139869 is a wasteful number, since it uses less digits than its factorization.

1052139869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19707.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1052139869 is about 32436.7055817942. The cubic root of 1052139869 is about 1017.0863502206.

The spelling of 1052139869 in words is "one billion, fifty-two million, one hundred thirty-nine thousand, eight hundred sixty-nine".