1258339540 has 12 divisors (see below), whose sum is σ = 2642513076. Its totient is φ = 503335808.

The previous prime is 1258339513. The next prime is 1258339561. The reversal of 1258339540 is 459338521.

It can be written as a sum of positive squares in 2 ways, for example, as 713210436 + 545129104 = 26706^2 + 23348^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1258339493 and 1258339502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31458469 + ... + 31458508.

It is an arithmetic number, because the mean of its divisors is an integer number (220209423).

Almost surely, 2^1258339540 is an apocalyptic number.

1258339540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258339540 is an abundant number, since it is smaller than the sum of its proper divisors (1384173536).

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

1258339540 is a wasteful number, since it uses less digits than its factorization.

1258339540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62916986 (or 62916984 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1258339540 is about 35473.0819072716. The cubic root of 1258339540 is about 1079.6076363926.

The spelling of 1258339540 in words is "one billion, two hundred fifty-eight million, three hundred thirty-nine thousand, five hundred forty".