10121553 has 12 divisors (see below), whose sum is σ = 15744820. Its totient is φ = 6228576.

The previous prime is 10121543. The next prime is 10121561. The reversal of 10121553 is 35512101.

It can be written as a sum of positive squares in 2 ways, for example, as 1896129 + 8225424 = 1377^2 + 2868^2 .

It is not a de Polignac number, because 10121553 - 2⁴ = 10121537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10121533) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 43138 + ... + 43371.

Almost surely, 2^10121553 is an apocalyptic number.

10121553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

10121553 is a deficient number, since it is larger than the sum of its proper divisors (5623267).

10121553 is a wasteful number, since it uses less digits than its factorization.

10121553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86528 (or 86525 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 10121553 is about 3181.4388254373. The cubic root of 10121553 is about 216.3128824669.

Adding to 10121553 its reverse (35512101), we get a palindrome (45633654).

The spelling of 10121553 in words is "ten million, one hundred twenty-one thousand, five hundred fifty-three".