421140766 has 16 divisors (see below), whose sum is σ = 667997568. Its totient is φ = 198806400.

The previous prime is 421140749. The next prime is 421140773. The reversal of 421140766 is 667041124.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80295 + ... + 85378.

It is an arithmetic number, because the mean of its divisors is an integer number (41749848).

Almost surely, 2^421140766 is an apocalyptic number.

421140766 is a deficient number, since it is larger than the sum of its proper divisors (246856802).

421140766 is a wasteful number, since it uses less digits than its factorization.

421140766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165747.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 421140766 is about 20521.7144995246. The cubic root of 421140766 is about 749.5646457081.

The spelling of 421140766 in words is "four hundred twenty-one million, one hundred forty thousand, seven hundred sixty-six".