1249726089 has 8 divisors (see below), whose sum is σ = 1682479552. Its totient is φ = 825061680.

The previous prime is 1249726069. The next prime is 1249726109. The reversal of 1249726089 is 9806279421.

It is an interprime number because it is at equal distance from previous prime (1249726069) and next prime (1249726109).

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

It is not a de Polignac number, because 1249726089 - 2⁵ = 1249726057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249726069) 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, 2021902 + ... + 2022519.

It is an arithmetic number, because the mean of its divisors is an integer number (210309944).

Almost surely, 2^1249726089 is an apocalyptic number.

It is an amenable number.

1249726089 is a deficient number, since it is larger than the sum of its proper divisors (432753463).

1249726089 is a wasteful number, since it uses less digits than its factorization.

1249726089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044527.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1249726089 is about 35351.4651605842. The cubic root of 1249726089 is about 1077.1386561533.

The spelling of 1249726089 in words is "one billion, two hundred forty-nine million, seven hundred twenty-six thousand, eighty-nine".