40261921 has 8 divisors (see below), whose sum is σ = 46376960. Its totient is φ = 34237728.

The previous prime is 40261919. The next prime is 40261943. The reversal of 40261921 is 12916204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40261921 - 2¹ = 40261919 is a prime.

It is a super-2 number, since 2×40261921² = 3242044565220482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40261021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21756 + ... + 23533.

It is an arithmetic number, because the mean of its divisors is an integer number (5797120).

Almost surely, 2^40261921 is an apocalyptic number.

It is an amenable number.

40261921 is a deficient number, since it is larger than the sum of its proper divisors (6115039).

40261921 is a wasteful number, since it uses less digits than its factorization.

40261921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45423.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 40261921 is about 6345.2282070860. The cubic root of 40261921 is about 342.7400302974.

The spelling of 40261921 in words is "forty million, two hundred sixty-one thousand, nine hundred twenty-one".