1946408121 has 12 divisors (see below), whose sum is σ = 3213118272. Its totient is φ = 1112233176.

The previous prime is 1946408071. The next prime is 1946408137. The reversal of 1946408121 is 1218046491.

1946408121 is a `hidden beast` number, since 1 + 9 + 4 + 640 + 8 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 1946408121 - 2¹⁷ = 1946277049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1946448121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15447621 + ... + 15447746.

It is an arithmetic number, because the mean of its divisors is an integer number (267759856).

Almost surely, 2^1946408121 is an apocalyptic number.

It is an amenable number.

1946408121 is a deficient number, since it is larger than the sum of its proper divisors (1266710151).

1946408121 is a wasteful number, since it uses less digits than its factorization.

1946408121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30895380 (or 30895377 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1946408121 is about 44118.1155649241. The cubic root of 1946408121 is about 1248.5654200274.

The spelling of 1946408121 in words is "one billion, nine hundred forty-six million, four hundred eight thousand, one hundred twenty-one".