10721842 has 4 divisors (see below), whose sum is σ = 16082766. Its totient is φ = 5360920.

The previous prime is 10721831. The next prime is 10721861. The reversal of 10721842 is 24812701.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 7557001 + 3164841 = 2749^2 + 1779^2 .

It is a super-2 number, since 2×10721842² = 229915791745928, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680459 + ... + 2680462.

Almost surely, 2^10721842 is an apocalyptic number.

10721842 is a deficient number, since it is larger than the sum of its proper divisors (5360924).

10721842 is an equidigital number, since it uses as much as digits as its factorization.

10721842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360923.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 10721842 is about 3274.4223918120. The cubic root of 10721842 is about 220.5073826505.

The spelling of 10721842 in words is "ten million, seven hundred twenty-one thousand, eight hundred forty-two".