1259138652 has 24 divisors (see below), whose sum is σ = 2939138832. Its totient is φ = 419548800.

The previous prime is 1259138633. The next prime is 1259138689. The reversal of 1259138652 is 2568319521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13752 + ... + 52032.

It is an arithmetic number, because the mean of its divisors is an integer number (122464118).

Almost surely, 2^1259138652 is an apocalyptic number.

1259138652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1259138652 is an abundant number, since it is smaller than the sum of its proper divisors (1680000180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1259138652 is a wasteful number, since it uses less digits than its factorization.

1259138652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41029 (or 41027 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 1259138652 is about 35484.3437589030. The cubic root of 1259138652 is about 1079.8361239692.

The spelling of 1259138652 in words is "one billion, two hundred fifty-nine million, one hundred thirty-eight thousand, six hundred fifty-two".