10121992 has 8 divisors (see below), whose sum is σ = 18978750.
Its totient is φ = 5060992.
The previous prime is 10121963. The next prime is 10121999. The reversal of 10121992 is 29912101.
It can be written as a sum of positive squares in only one way, i.e., 9897316 + 224676 = 3146^2 + 474^2
It is a tau number, because it is divible by the number of its divisors (8).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10121999) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632617 + ... + 632632.
Almost surely, 210121992 is an apocalyptic number.
It is an amenable number.
10121992 is a deficient number, since it is larger than the sum of its proper divisors (8856758).
10121992 is a wasteful number, since it uses less digits than its factorization.
10121992 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1265255 (or 1265251 counting only the distinct ones).
The product of its (nonzero) digits is 324, while the sum is 25.
The square root of 10121992 is about 3181.5078186294.
The cubic root of 10121992 is about 216.3160097861.
The spelling of 10121992 in words is "ten million, one hundred twenty-one thousand, nine hundred ninety-two".