1258717540 has 24 divisors (see below), whose sum is σ = 2646221760. Its totient is φ = 502931808.

The previous prime is 1258717531. The next prime is 1258717597. The reversal of 1258717540 is 457178521.

It is a junction number, because it is equal to n+sod(n) for n = 1258717493 and 1258717502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15862 + ... + 52621.

It is an arithmetic number, because the mean of its divisors is an integer number (110259240).

Almost surely, 2^1258717540 is an apocalyptic number.

1258717540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258717540 is an abundant number, since it is smaller than the sum of its proper divisors (1387504220).

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

1258717540 is a wasteful number, since it uses less digits than its factorization.

1258717540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69411 (or 69409 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 1258717540 is about 35478.4094908439. The cubic root of 1258717540 is about 1079.7157287946.

The spelling of 1258717540 in words is "one billion, two hundred fifty-eight million, seven hundred seventeen thousand, five hundred forty".