1258881515 has 4 divisors (see below), whose sum is σ = 1510657824. Its totient is φ = 1007105208.

The previous prime is 1258881509. The next prime is 1258881523. The reversal of 1258881515 is 5151888521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5151888521 = 13 ⋅396299117.

It is a cyclic number.

It is not a de Polignac number, because 1258881515 - 2¹⁴ = 1258865131 is a prime.

It is a Duffinian 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, 125888147 + ... + 125888156.

It is an arithmetic number, because the mean of its divisors is an integer number (377664456).

Almost surely, 2^1258881515 is an apocalyptic number.

1258881515 is a deficient number, since it is larger than the sum of its proper divisors (251776309).

1258881515 is an equidigital number, since it uses as much as digits as its factorization.

1258881515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251776308.

The product of its digits is 128000, while the sum is 44.

The square root of 1258881515 is about 35480.7203280880. The cubic root of 1258881515 is about 1079.7626121484.

The spelling of 1258881515 in words is "one billion, two hundred fifty-eight million, eight hundred eighty-one thousand, five hundred fifteen".