921256141 has 8 divisors (see below), whose sum is σ = 992408760. Its totient is φ = 850144512.

The previous prime is 921256121. The next prime is 921256151. The reversal of 921256141 is 141652129.

921256141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 47817225 + 873438916 = 6915^2 + 29554^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 921256141 - 2⁷ = 921256013 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921256111) 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, 49281 + ... + 65353.

It is an arithmetic number, because the mean of its divisors is an integer number (124051095).

Almost surely, 2^921256141 is an apocalyptic number.

It is an amenable number.

921256141 is a deficient number, since it is larger than the sum of its proper divisors (71152619).

921256141 is a wasteful number, since it uses less digits than its factorization.

921256141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20495.

The product of its digits is 4320, while the sum is 31.

The square root of 921256141 is about 30352.2015840696. The cubic root of 921256141 is about 973.0312729919.

The spelling of 921256141 in words is "nine hundred twenty-one million, two hundred fifty-six thousand, one hundred forty-one".