10721507 has 8 divisors (see below), whose sum is σ = 10943856. Its totient is φ = 10501632.

The previous prime is 10721489. The next prime is 10721549. The reversal of 10721507 is 70512701.

It is a happy number.

10721507 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 10721507 - 2¹⁰ = 10720483 is a prime.

It is a super-2 number, since 2×10721507² = 229901424702098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10721587) 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, 9863 + ... + 10895.

It is an arithmetic number, because the mean of its divisors is an integer number (1367982).

Almost surely, 2^10721507 is an apocalyptic number.

10721507 is a deficient number, since it is larger than the sum of its proper divisors (222349).

10721507 is a wasteful number, since it uses less digits than its factorization.

10721507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 10721507 is about 3274.3712373523. The cubic root of 10721507 is about 220.5050860693.

The spelling of 10721507 in words is "ten million, seven hundred twenty-one thousand, five hundred seven".