1047791242 has 4 divisors (see below), whose sum is σ = 1571686866. Its totient is φ = 523895620.

The previous prime is 1047791219. The next prime is 1047791249. The reversal of 1047791242 is 2421977401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2421977401 = 373 ⋅6493237.

It can be written as a sum of positive squares in only one way, i.e., 998496801 + 49294441 = 31599^2 + 7021^2 .

It is not an unprimeable number, because it can be changed into a prime (1047791249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261947809 + ... + 261947812.

Almost surely, 2^1047791242 is an apocalyptic number.

1047791242 is a deficient number, since it is larger than the sum of its proper divisors (523895624).

1047791242 is an equidigital number, since it uses as much as digits as its factorization.

1047791242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523895623.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1047791242 is about 32369.6036738172. The cubic root of 1047791242 is about 1015.6831664700.

The spelling of 1047791242 in words is "one billion, forty-seven million, seven hundred ninety-one thousand, two hundred forty-two".