420742 has 16 divisors (see below), whose sum is σ = 739872. Its totient is φ = 175680.

The previous prime is 420737. The next prime is 420743. The reversal of 420742 is 247024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420743) by changing a digit.

420742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208 + ... + 940.

It is an arithmetic number, because the mean of its divisors is an integer number (46242).

2⁴²⁰⁷⁴² is an apocalyptic number.

420742 is a deficient number, since it is larger than the sum of its proper divisors (319130).

420742 is a wasteful number, since it uses less digits than its factorization.

420742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 420742 is about 648.6462826533. The cubic root of 420742 is about 74.9327990644.

Adding to 420742 its reverse (247024), we get a palindrome (667766).

It can be divided in two parts, 42074 and 2, that multiplied together give a palindrome (84148).

The spelling of 420742 in words is "four hundred twenty thousand, seven hundred forty-two", and thus it is an iban number.