40140261 has 24 divisors (see below), whose sum is σ = 67620800. Its totient is φ = 22935528.

The previous prime is 40140259. The next prime is 40140283. The reversal of 40140261 is 16204104.

40140261 is a `hidden beast` number, since 401 + 4 + 0 + 261 = 666.

It is not a de Polignac number, because 40140261 - 2¹ = 40140259 is a prime.

It is a super-2 number, since 2×40140261² = 3222481106296242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3415 + ... + 9588.

Almost surely, 2^40140261 is an apocalyptic number.

It is an amenable number.

40140261 is a deficient number, since it is larger than the sum of its proper divisors (27480539).

40140261 is a wasteful number, since it uses less digits than its factorization.

40140261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13030 (or 13013 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40140261 is about 6335.6342223964. The cubic root of 40140261 is about 342.3944612398.

Adding to 40140261 its reverse (16204104), we get a palindrome (56344365).

It can be divided in two parts, 40140 and 261, that added together give a square (40401 = 201²).

The spelling of 40140261 in words is "forty million, one hundred forty thousand, two hundred sixty-one".