1248325921 has 4 divisors (see below), whose sum is σ = 1252768644. Its totient is φ = 1243883200.

The previous prime is 1248325877. The next prime is 1248325927. The reversal of 1248325921 is 1295238421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1091575521 + 156750400 = 33039^2 + 12520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248325921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248325927) 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, 2220940 + ... + 2221501.

It is an arithmetic number, because the mean of its divisors is an integer number (313192161).

Almost surely, 2^1248325921 is an apocalyptic number.

It is an amenable number.

1248325921 is a deficient number, since it is larger than the sum of its proper divisors (4442723).

1248325921 is an equidigital number, since it uses as much as digits as its factorization.

1248325921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442722.

The product of its digits is 34560, while the sum is 37.

The square root of 1248325921 is about 35331.6560749705. The cubic root of 1248325921 is about 1076.7362376593.

The spelling of 1248325921 in words is "one billion, two hundred forty-eight million, three hundred twenty-five thousand, nine hundred twenty-one".