10155921 has 8 divisors (see below), whose sum is σ = 13601280. Its totient is φ = 6740592.

The previous prime is 10155917. The next prime is 10155961. The reversal of 10155921 is 12955101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10155921 - 2² = 10155917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10155891 and 10155900.

It is not an unprimeable number, because it can be changed into a prime (10155961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6705 + ... + 8078.

It is an arithmetic number, because the mean of its divisors is an integer number (1700160).

Almost surely, 2^10155921 is an apocalyptic number.

It is an amenable number.

10155921 is a deficient number, since it is larger than the sum of its proper divisors (3445359).

10155921 is a wasteful number, since it uses less digits than its factorization.

10155921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15015.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 10155921 is about 3186.8355778107. The cubic root of 10155921 is about 216.5574379086.

The spelling of 10155921 in words is "ten million, one hundred fifty-five thousand, nine hundred twenty-one".