1258738487 has 4 divisors (see below), whose sum is σ = 1258809456. Its totient is φ = 1258667520.

The previous prime is 1258738469. The next prime is 1258738493. The reversal of 1258738487 is 7848378521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7848378521 = 2791 ⋅2812031.

It is a cyclic number.

It is not a de Polignac number, because 1258738487 - 2⁸ = 1258738231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258738427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16823 + ... + 52919.

It is an arithmetic number, because the mean of its divisors is an integer number (314702364).

Almost surely, 2^1258738487 is an apocalyptic number.

1258738487 is a deficient number, since it is larger than the sum of its proper divisors (70969).

1258738487 is an equidigital number, since it uses as much as digits as its factorization.

1258738487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70968.

The product of its digits is 3010560, while the sum is 53.

The square root of 1258738487 is about 35478.7046973251. The cubic root of 1258738487 is about 1079.7217181394.

The spelling of 1258738487 in words is "one billion, two hundred fifty-eight million, seven hundred thirty-eight thousand, four hundred eighty-seven".