421020782 has 32 divisors (see below), whose sum is σ = 804081600. Its totient is φ = 160812288.

The previous prime is 421020781. The next prime is 421020797. The reversal of 421020782 is 287020124.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421020781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34607 + ... + 45162.

It is an arithmetic number, because the mean of its divisors is an integer number (25127550).

Almost surely, 2^421020782 is an apocalyptic number.

421020782 is a deficient number, since it is larger than the sum of its proper divisors (383060818).

421020782 is a wasteful number, since it uses less digits than its factorization.

421020782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79820.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 421020782 is about 20518.7909487864. The cubic root of 421020782 is about 749.4934547002.

The spelling of 421020782 in words is "four hundred twenty-one million, twenty thousand, seven hundred eighty-two".