421136775 has 36 divisors (see below), whose sum is σ = 774704632. Its totient is φ = 218531520.

The previous prime is 421136761. The next prime is 421136777. The reversal of 421136775 is 577631124.

It is a happy number.

It is not a de Polignac number, because 421136775 - 2¹⁴ = 421120391 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 (421136777) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16969 + ... + 33618.

Almost surely, 2^421136775 is an apocalyptic number.

421136775 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421136775 is a deficient number, since it is larger than the sum of its proper divisors (353567857).

421136775 is a wasteful number, since it uses less digits than its factorization.

421136775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50640 (or 50632 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 421136775 is about 20521.6172608301. The cubic root of 421136775 is about 749.5622779155.

Adding to 421136775 its reverse (577631124), we get a palindrome (998767899).

The spelling of 421136775 in words is "four hundred twenty-one million, one hundred thirty-six thousand, seven hundred seventy-five".