40956921 has 24 divisors (see below), whose sum is σ = 63341824. Its totient is φ = 26418960.

The previous prime is 40956919. The next prime is 40956953. The reversal of 40956921 is 12965904.

It is not a de Polignac number, because 40956921 - 2¹ = 40956919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40956911) 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, 4815 + ... + 10251.

Almost surely, 2^40956921 is an apocalyptic number.

It is an amenable number.

40956921 is a deficient number, since it is larger than the sum of its proper divisors (22384903).

40956921 is an equidigital number, since it uses as much as digits as its factorization.

40956921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483 (or 5471 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 40956921 is about 6399.7594486043. The cubic root of 40956921 is about 344.7009128131.

The spelling of 40956921 in words is "forty million, nine hundred fifty-six thousand, nine hundred twenty-one".