40755621 has 8 divisors (see below), whose sum is σ = 54879264. Its totient is φ = 26901200.

The previous prime is 40755619. The next prime is 40755629. The reversal of 40755621 is 12655704.

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 40755621 - 2¹ = 40755619 is a prime.

It is a super-2 number, since 2×40755621² = 3322041286191282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40755629) 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, 66951 + ... + 67556.

It is an arithmetic number, because the mean of its divisors is an integer number (6859908).

Almost surely, 2^40755621 is an apocalyptic number.

It is an amenable number.

40755621 is a deficient number, since it is larger than the sum of its proper divisors (14123643).

40755621 is a wasteful number, since it uses less digits than its factorization.

40755621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134611.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 40755621 is about 6384.0129229193. The cubic root of 40755621 is about 344.1352592534.

The spelling of 40755621 in words is "forty million, seven hundred fifty-five thousand, six hundred twenty-one".