420739 has 8 divisors (see below), whose sum is σ = 479232. Its totient is φ = 365640.

The previous prime is 420737. The next prime is 420743. The reversal of 420739 is 937024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420739 - 2¹ = 420737 is a prime.

It is a super-2 number, since 2×420739² = 354042612242, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420739.

It is not an unprimeable number, because it can be changed into a prime (420731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579 + ... + 1084.

It is an arithmetic number, because the mean of its divisors is an integer number (59904).

2⁴²⁰⁷³⁹ is an apocalyptic number.

420739 is a deficient number, since it is larger than the sum of its proper divisors (58493).

420739 is a wasteful number, since it uses less digits than its factorization.

420739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 420739 is about 648.6439701408. The cubic root of 420739 is about 74.9326209672.

The spelling of 420739 in words is "four hundred twenty thousand, seven hundred thirty-nine".