40587961 has 4 divisors (see below), whose sum is σ = 40989924. Its totient is φ = 40186000.

The previous prime is 40587949. The next prime is 40587973. The reversal of 40587961 is 16978504.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40587949) and next prime (40587973).

It can be written as a sum of positive squares in 2 ways, for example, as 37748736 + 2839225 = 6144^2 + 1685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40587961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40587161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200830 + ... + 201031.

It is an arithmetic number, because the mean of its divisors is an integer number (10247481).

Almost surely, 2^40587961 is an apocalyptic number.

It is an amenable number.

40587961 is a deficient number, since it is larger than the sum of its proper divisors (401963).

40587961 is a wasteful number, since it uses less digits than its factorization.

40587961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401962.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40587961 is about 6370.8681512020. The cubic root of 40587961 is about 343.6627107950.

The spelling of 40587961 in words is "forty million, five hundred eighty-seven thousand, nine hundred sixty-one".