1239129371 has 16 divisors (see below), whose sum is σ = 1393964640. Its totient is φ = 1095575040.

The previous prime is 1239129341. The next prime is 1239129377. The reversal of 1239129371 is 1739219321.

It is a cyclic number.

It is not a de Polignac number, because 1239129371 - 2¹⁰ = 1239128347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1239129377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15725 + ... + 52206.

It is an arithmetic number, because the mean of its divisors is an integer number (87122790).

Almost surely, 2^1239129371 is an apocalyptic number.

1239129371 is a deficient number, since it is larger than the sum of its proper divisors (154835269).

1239129371 is a wasteful number, since it uses less digits than its factorization.

1239129371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68014.

The product of its digits is 20412, while the sum is 38.

The square root of 1239129371 is about 35201.2694515411. The cubic root of 1239129371 is about 1074.0855742136.

The spelling of 1239129371 in words is "one billion, two hundred thirty-nine million, one hundred twenty-nine thousand, three hundred seventy-one".