40021454 has 8 divisors (see below), whose sum is σ = 65489688. Its totient is φ = 18191560.

The previous prime is 40021427. The next prime is 40021459. The reversal of 40021454 is 45412004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021459) 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, 909557 + ... + 909600.

It is an arithmetic number, because the mean of its divisors is an integer number (8186211).

Almost surely, 2^40021454 is an apocalyptic number.

40021454 is a deficient number, since it is larger than the sum of its proper divisors (25468234).

40021454 is a wasteful number, since it uses less digits than its factorization.

40021454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819170.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40021454 is about 6326.2511805966. The cubic root of 40021454 is about 342.0563214472.

Adding to 40021454 its reverse (45412004), we get a palindrome (85433458).

The spelling of 40021454 in words is "forty million, twenty-one thousand, four hundred fifty-four".