40150421 has 2 divisors, whose sum is σ = 40150422. Its totient is φ = 40150420.

The previous prime is 40150417. The next prime is 40150423. The reversal of 40150421 is 12405104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31798321 + 8352100 = 5639^2 + 2890^2 .

It is a cyclic number.

It is not a de Polignac number, because 40150421 - 2² = 40150417 is a prime.

It is a super-2 number, since 2×40150421² = 3224112612954482, which contains 22 as substring.

Together with 40150423, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40150421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40150423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20075210 + 20075211.

It is an arithmetic number, because the mean of its divisors is an integer number (20075211).

Almost surely, 2^40150421 is an apocalyptic number.

It is an amenable number.

40150421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40150421 is an equidigital number, since it uses as much as digits as its factorization.

40150421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40150421 is about 6336.4359856310. The cubic root of 40150421 is about 342.4233469037.

Adding to 40150421 its reverse (12405104), we get a palindrome (52555525).

The spelling of 40150421 in words is "forty million, one hundred fifty thousand, four hundred twenty-one".