1239051634 has 16 divisors (see below), whose sum is σ = 1909893528. Its totient is φ = 602439552.

The previous prime is 1239051629. The next prime is 1239051637. The reversal of 1239051634 is 4361509321.

It can be written as a sum of positive squares in 4 ways, for example, as 1238688025 + 363609 = 35195^2 + 603^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1239051634.

It is not an unprimeable number, because it can be changed into a prime (1239051637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169054 + ... + 176230.

Almost surely, 2^1239051634 is an apocalyptic number.

1239051634 is a deficient number, since it is larger than the sum of its proper divisors (670841894).

1239051634 is a wasteful number, since it uses less digits than its factorization.

1239051634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1239051634 is about 35200.1652552939. The cubic root of 1239051634 is about 1074.0631127611.

The spelling of 1239051634 in words is "one billion, two hundred thirty-nine million, fifty-one thousand, six hundred thirty-four".