40132021 has 8 divisors (see below), whose sum is σ = 40580280. Its totient is φ = 39686592.

The previous prime is 40132007. The next prime is 40132039. The reversal of 40132021 is 12023104.

It can be written as a sum of positive squares in 4 ways, for example, as 9991921 + 30140100 = 3161^2 + 5490^2 .

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 40132021 - 2⁷ = 40131893 is a prime.

It is a super-2 number, since 2×40132021² = 3221158219088882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40131992 and 40132010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40132061) 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, 39111 + ... + 40123.

It is an arithmetic number, because the mean of its divisors is an integer number (5072535).

Almost surely, 2^40132021 is an apocalyptic number.

It is an amenable number.

40132021 is a deficient number, since it is larger than the sum of its proper divisors (448259).

40132021 is a wasteful number, since it uses less digits than its factorization.

40132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40132021 is about 6334.9838989535. The cubic root of 40132021 is about 342.3710307043.

Adding to 40132021 its reverse (12023104), we get a palindrome (52155125).

The spelling of 40132021 in words is "forty million, one hundred thirty-two thousand, twenty-one".