246138921 has 48 divisors (see below), whose sum is σ = 423072000. Its totient is φ = 134918784.

The previous prime is 246138889. The next prime is 246138929. The reversal of 246138921 is 129831642.

246138921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 246138921 - 2⁵ = 246138889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (246138929) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 363235 + ... + 363911.

It is an arithmetic number, because the mean of its divisors is an integer number (8814000).

Almost surely, 2^246138921 is an apocalyptic number.

246138921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

246138921 is a deficient number, since it is larger than the sum of its proper divisors (176933079).

246138921 is a wasteful number, since it uses less digits than its factorization.

246138921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 915 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 246138921 is about 15688.8151560276. The cubic root of 246138921 is about 626.7005812275.

The spelling of 246138921 in words is "two hundred forty-six million, one hundred thirty-eight thousand, nine hundred twenty-one".