40124143421 has 4 divisors (see below), whose sum is σ = 40126771200. Its totient is φ = 40121515644.

The previous prime is 40124143373. The next prime is 40124143439. The reversal of 40124143421 is 12434142104.

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 40124143421 - 2⁶ = 40124143357 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 (40124143481) 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, 1290851 + ... + 1321568.

It is an arithmetic number, because the mean of its divisors is an integer number (10031692800).

Almost surely, 2^40124143421 is an apocalyptic number.

It is an amenable number.

40124143421 is a deficient number, since it is larger than the sum of its proper divisors (2627779).

40124143421 is a wasteful number, since it uses less digits than its factorization.

40124143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627778.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 40124143421 its reverse (12434142104), we get a palindrome (52558285525).

The spelling of 40124143421 in words is "forty billion, one hundred twenty-four million, one hundred forty-three thousand, four hundred twenty-one".