40417561 has 8 divisors (see below), whose sum is σ = 42134400. Its totient is φ = 38722320.

The previous prime is 40417547. The next prime is 40417571. The reversal of 40417561 is 16571404.

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

It is a cyclic number.

It is not a de Polignac number, because 40417561 - 2¹⁷ = 40286489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40417571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1521 + ... + 9118.

It is an arithmetic number, because the mean of its divisors is an integer number (5266800).

Almost surely, 2^40417561 is an apocalyptic number.

It is an amenable number.

40417561 is a deficient number, since it is larger than the sum of its proper divisors (1716839).

40417561 is a wasteful number, since it uses less digits than its factorization.

40417561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10799.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 40417561 is about 6357.4807117285. The cubic root of 40417561 is about 343.1811043701.

Adding to 40417561 its reverse (16571404), we get a palindrome (56988965).

The spelling of 40417561 in words is "forty million, four hundred seventeen thousand, five hundred sixty-one".