1258364991 has 8 divisors (see below), whose sum is σ = 1806883120. Its totient is φ = 774378432.

The previous prime is 1258364977. The next prime is 1258365001. The reversal of 1258364991 is 1994638521.

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

It is not a de Polignac number, because 1258364991 - 2⁹ = 1258364479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1258364991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258364971) 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, 16132846 + ... + 16132923.

It is an arithmetic number, because the mean of its divisors is an integer number (225860390).

Almost surely, 2^1258364991 is an apocalyptic number.

1258364991 is a deficient number, since it is larger than the sum of its proper divisors (548518129).

1258364991 is a wasteful number, since it uses less digits than its factorization.

1258364991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32265785.

The product of its digits is 466560, while the sum is 48.

The square root of 1258364991 is about 35473.4406422608. The cubic root of 1258364991 is about 1079.6149150080.

The spelling of 1258364991 in words is "one billion, two hundred fifty-eight million, three hundred sixty-four thousand, nine hundred ninety-one".