420750747 has 16 divisors (see below), whose sum is σ = 623863680. Its totient is φ = 280262376.

The previous prime is 420750739. The next prime is 420750751. The reversal of 420750747 is 747057024.

It is a happy number.

It is not a de Polignac number, because 420750747 - 2³ = 420750739 is a prime.

It is a super-2 number, since 2×420750747² = 354062382202116018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (420750727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29328 + ... + 41250.

It is an arithmetic number, because the mean of its divisors is an integer number (38991480).

Almost surely, 2^420750747 is an apocalyptic number.

420750747 is a deficient number, since it is larger than the sum of its proper divisors (203112933).

420750747 is a wasteful number, since it uses less digits than its factorization.

420750747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13239 (or 13233 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 420750747 is about 20512.2097054413. The cubic root of 420750747 is about 749.3331833164. Note that the first 3 decimals are identical.

The spelling of 420750747 in words is "four hundred twenty million, seven hundred fifty thousand, seven hundred forty-seven".