1258149089 has 4 divisors (see below), whose sum is σ = 1263691824. Its totient is φ = 1252606356.

The previous prime is 1258149071. The next prime is 1258149127. The reversal of 1258149089 is 9809418521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9809418521 = 7 ⋅1401345503.

It is a cyclic number.

It is not a de Polignac number, because 1258149089 - 2¹⁶ = 1258083553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1258149019) 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, 2771027 + ... + 2771480.

It is an arithmetic number, because the mean of its divisors is an integer number (315922956).

Almost surely, 2^1258149089 is an apocalyptic number.

It is an amenable number.

1258149089 is a deficient number, since it is larger than the sum of its proper divisors (5542735).

1258149089 is an equidigital number, since it uses as much as digits as its factorization.

1258149089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542734.

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 1258149089 is about 35470.3973617438. The cubic root of 1258149089 is about 1079.5531670644.

The spelling of 1258149089 in words is "one billion, two hundred fifty-eight million, one hundred forty-nine thousand, eighty-nine".