10521138 has 16 divisors (see below), whose sum is σ = 21490560. Its totient is φ = 3432336.

The previous prime is 10521107. The next prime is 10521149. The reversal of 10521138 is 83112501.

It is a super-2 number, since 2×10521138² = 221388689630088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18373 + ... + 18936.

It is an arithmetic number, because the mean of its divisors is an integer number (1343160).

Almost surely, 2^10521138 is an apocalyptic number.

10521138 is an abundant number, since it is smaller than the sum of its proper divisors (10969422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10521138 is a wasteful number, since it uses less digits than its factorization.

10521138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37361.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 10521138 is about 3243.6303735167. The cubic root of 10521138 is about 219.1228017932.

Adding to 10521138 its reverse (83112501), we get a palindrome (93633639).

The spelling of 10521138 in words is "ten million, five hundred twenty-one thousand, one hundred thirty-eight".