10521901 has 4 divisors (see below), whose sum is σ = 11331292. Its totient is φ = 9712512.

The previous prime is 10521893. The next prime is 10521919. The reversal of 10521901 is 10912501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10912501 = 239 ⋅45659.

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 4141225 = 2526^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521901 - 2³ = 10521893 is a prime.

It is a super-2 number, since 2×10521901² = 221420801307602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404676 + ... + 404701.

It is an arithmetic number, because the mean of its divisors is an integer number (2832823).

Almost surely, 2^10521901 is an apocalyptic number.

It is an amenable number.

10521901 is a deficient number, since it is larger than the sum of its proper divisors (809391).

10521901 is an equidigital number, since it uses as much as digits as its factorization.

10521901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809390.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 10521901 is about 3243.7479865119. The cubic root of 10521901 is about 219.1280986427.

The spelling of 10521901 in words is "ten million, five hundred twenty-one thousand, nine hundred one".