40030261 has 4 divisors (see below), whose sum is σ = 40708800. Its totient is φ = 39351724.

The previous prime is 40030247. The next prime is 40030271. The reversal of 40030261 is 16203004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40030261 - 2⁹ = 40029749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40030201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339181 + ... + 339298.

It is an arithmetic number, because the mean of its divisors is an integer number (10177200).

Almost surely, 2^40030261 is an apocalyptic number.

It is an amenable number.

40030261 is a deficient number, since it is larger than the sum of its proper divisors (678539).

40030261 is an equidigital number, since it uses as much as digits as its factorization.

40030261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678538.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40030261 is about 6326.9472101480. The cubic root of 40030261 is about 342.0814102331.

Adding to 40030261 its reverse (16203004), we get a palindrome (56233265).

The spelling of 40030261 in words is "forty million, thirty thousand, two hundred sixty-one".