421306775 has 12 divisors (see below), whose sum is σ = 535163664. Its totient is φ = 328824000.

The previous prime is 421306759. The next prime is 421306783. The reversal of 421306775 is 577603124.

It is not a de Polignac number, because 421306775 - 2⁴ = 421306759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204491 + ... + 206540.

It is an arithmetic number, because the mean of its divisors is an integer number (44596972).

Almost surely, 2^421306775 is an apocalyptic number.

421306775 is a deficient number, since it is larger than the sum of its proper divisors (113856889).

421306775 is a wasteful number, since it uses less digits than its factorization.

421306775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411082 (or 411077 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 421306775 is about 20525.7588166674. The cubic root of 421306775 is about 749.6631227817.

Adding to 421306775 its reverse (577603124), we get a palindrome (998909899).

The spelling of 421306775 in words is "four hundred twenty-one million, three hundred six thousand, seven hundred seventy-five".