1145270821 has 8 divisors (see below), whose sum is σ = 1160438400. Its totient is φ = 1130120160.

The previous prime is 1145270783. The next prime is 1145270827. The reversal of 1145270821 is 1280725411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145270821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145270827) 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, 189870 + ... + 195808.

It is an arithmetic number, because the mean of its divisors is an integer number (145054800).

Almost surely, 2^1145270821 is an apocalyptic number.

It is an amenable number.

1145270821 is a deficient number, since it is larger than the sum of its proper divisors (15167579).

1145270821 is an equidigital number, since it uses as much as digits as its factorization.

1145270821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8459.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1145270821 is about 33841.8501415038. The cubic root of 1145270821 is about 1046.2514317818.

The spelling of 1145270821 in words is "one billion, one hundred forty-five million, two hundred seventy thousand, eight hundred twenty-one".