1320125091 has 8 divisors (see below), whose sum is σ = 1763329104. Its totient is φ = 878502240.

The previous prime is 1320125071. The next prime is 1320125119. The reversal of 1320125091 is 1905210231.

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

It is not a de Polignac number, because 1320125091 - 2⁷ = 1320124963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320125041) 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, 393340 + ... + 396681.

It is an arithmetic number, because the mean of its divisors is an integer number (220416138).

Almost surely, 2^1320125091 is an apocalyptic number.

1320125091 is a deficient number, since it is larger than the sum of its proper divisors (443204013).

1320125091 is an equidigital number, since it uses as much as digits as its factorization.

1320125091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790581.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1320125091 is about 36333.5257166161. The cubic root of 1320125091 is about 1096.9959609039.

The spelling of 1320125091 in words is "one billion, three hundred twenty million, one hundred twenty-five thousand, ninety-one".