1047202491 has 4 divisors (see below), whose sum is σ = 1396269992. Its totient is φ = 698134992.

The previous prime is 1047202487. The next prime is 1047202511. The reversal of 1047202491 is 1942027401.

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

It is not a de Polignac number, because 1047202491 - 2² = 1047202487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1047202421) 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, 174533746 + ... + 174533751.

It is an arithmetic number, because the mean of its divisors is an integer number (349067498).

Almost surely, 2^1047202491 is an apocalyptic number.

1047202491 is a deficient number, since it is larger than the sum of its proper divisors (349067501).

1047202491 is an equidigital number, since it uses as much as digits as its factorization.

1047202491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349067500.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1047202491 is about 32360.5082005830. The cubic root of 1047202491 is about 1015.4928943073.

Adding to 1047202491 its reverse (1942027401), we get a palindrome (2989229892).

The spelling of 1047202491 in words is "one billion, forty-seven million, two hundred two thousand, four hundred ninety-one".