10721251 has 6 divisors (see below), whose sum is σ = 10838756. Its totient is φ = 10605000.

The previous prime is 10721219. The next prime is 10721261. The reversal of 10721251 is 15212701.

It is not a de Polignac number, because 10721251 - 2⁵ = 10721219 is a prime.

It is a super-2 number, since 2×10721251² = 229890446010002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10721261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9676 + ... + 10726.

Almost surely, 2^10721251 is an apocalyptic number.

10721251 is a deficient number, since it is larger than the sum of its proper divisors (117505).

10721251 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 10721251 = (22150711)₉.

10721251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 10721251 is about 3274.3321456444. The cubic root of 10721251 is about 220.5033310377.

Adding to 10721251 its reverse (15212701), we get a palindrome (25933952).

The spelling of 10721251 in words is "ten million, seven hundred twenty-one thousand, two hundred fifty-one".