1258538465 has 8 divisors (see below), whose sum is σ = 1558963968. Its totient is φ = 974352240.

The previous prime is 1258538459. The next prime is 1258538467. The reversal of 1258538465 is 5648358521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1258538465 - 2¹⁴ = 1258522081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1258538467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4059647 + ... + 4059956.

It is an arithmetic number, because the mean of its divisors is an integer number (194870496).

Almost surely, 2^1258538465 is an apocalyptic number.

It is an amenable number.

1258538465 is a deficient number, since it is larger than the sum of its proper divisors (300425503).

1258538465 is an equidigital number, since it uses as much as digits as its factorization.

1258538465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119639.

The product of its digits is 1152000, while the sum is 47.

The square root of 1258538465 is about 35475.8856830947. The cubic root of 1258538465 is about 1079.6645234321.

The spelling of 1258538465 in words is "one billion, two hundred fifty-eight million, five hundred thirty-eight thousand, four hundred sixty-five".