8401945 has 8 divisors (see below), whose sum is σ = 10107144. Its totient is φ = 6705024.

The previous prime is 8401919. The next prime is 8401949. The reversal of 8401945 is 5491048.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 5031049 = 1836^2 + 2243^2 .

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 8401945 - 2²³ = 13337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8401949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447 + ... + 4123.

It is an arithmetic number, because the mean of its divisors is an integer number (1263393).

Almost surely, 2^8401945 is an apocalyptic number.

It is an amenable number.

8401945 is a deficient number, since it is larger than the sum of its proper divisors (1705199).

8401945 is a wasteful number, since it uses less digits than its factorization.

8401945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 8401945 is about 2898.6108741947. The cubic root of 8401945 is about 203.2949597626.

The spelling of 8401945 in words is "eight million, four hundred one thousand, nine hundred forty-five".