10042781 has 8 divisors (see below), whose sum is σ = 11496960. Its totient is φ = 8593488.

The previous prime is 10042777. The next prime is 10042807. The reversal of 10042781 is 18724001.

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 10042781 - 2² = 10042777 is a prime.

It is a super-2 number, since 2×10042781² = 201714900427922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10042741) 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, 6260 + ... + 7698.

It is an arithmetic number, because the mean of its divisors is an integer number (1437120).

Almost surely, 2^10042781 is an apocalyptic number.

It is an amenable number.

10042781 is a deficient number, since it is larger than the sum of its proper divisors (1454179).

10042781 is an equidigital number, since it uses as much as digits as its factorization.

10042781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 10042781 is about 3169.0347110753. The cubic root of 10042781 is about 215.7502614902.

Adding to 10042781 its reverse (18724001), we get a palindrome (28766782).

The spelling of 10042781 in words is "ten million, forty-two thousand, seven hundred eighty-one".