1042794721 has 8 divisors (see below), whose sum is σ = 1050418304. Its totient is φ = 1035199440.

The previous prime is 1042794703. The next prime is 1042794761. The reversal of 1042794721 is 1274972401.

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

It is a cyclic number.

It is not a de Polignac number, because 1042794721 - 2¹⁵ = 1042761953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042794761) 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, 69895 + ... + 83491.

It is an arithmetic number, because the mean of its divisors is an integer number (131302288).

Almost surely, 2^1042794721 is an apocalyptic number.

It is an amenable number.

1042794721 is a deficient number, since it is larger than the sum of its proper divisors (7623583).

1042794721 is a wasteful number, since it uses less digits than its factorization.

1042794721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14151.

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

The square root of 1042794721 is about 32292.3322322808. The cubic root of 1042794721 is about 1014.0661234820.

The spelling of 1042794721 in words is "one billion, forty-two million, seven hundred ninety-four thousand, seven hundred twenty-one".