40161345 has 64 divisors (see below), whose sum is σ = 79349760. Its totient is φ = 16934400.

The previous prime is 40161313. The next prime is 40161403. The reversal of 40161345 is 54316104.

40161345 = T₃₇₉ + T₃₈₀ + ... + T₆₆₅.

It is not a de Polignac number, because 40161345 - 2⁵ = 40161313 is a prime.

It is a super-2 number, since 2×40161345² = 3225867264418050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81550 + ... + 82040.

It is an arithmetic number, because the mean of its divisors is an integer number (1239840).

Almost surely, 2^40161345 is an apocalyptic number.

It is an amenable number.

40161345 is a deficient number, since it is larger than the sum of its proper divisors (39188415).

40161345 is a wasteful number, since it uses less digits than its factorization.

40161345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40161345 is about 6337.2979257725. The cubic root of 40161345 is about 342.4543992427.

Adding to 40161345 its reverse (54316104), we get a palindrome (94477449).

The spelling of 40161345 in words is "forty million, one hundred sixty-one thousand, three hundred forty-five".