1001279449 has 3 divisors (see below), whose sum is σ = 1001311093. Its totient is φ = 1001247806.

The previous prime is 1001279443. The next prime is 1001279471. The reversal of 1001279449 is 9449721001.

The square root of 1001279449 is 31643.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1001279449 - 2³ = 1001279441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001279441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15822 + ... + 47464.

Almost surely, 2^1001279449 is an apocalyptic number.

1001279449 is the 31643-rd square number.

1001279449 is the 15822-nd centered octagonal number.

It is an amenable number.

1001279449 is a deficient number, since it is larger than the sum of its proper divisors (31644).

1001279449 is an frugal number, since it uses more digits than its factorization.

1001279449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63286 (or 31643 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The cubic root of 1001279449 is about 1000.4263012414.

The spelling of 1001279449 in words is "one billion, one million, two hundred seventy-nine thousand, four hundred forty-nine".