1726420 has 24 divisors (see below), whose sum is σ = 3725064. Its totient is φ = 671616.

The previous prime is 1726411. The next prime is 1726429. The reversal of 1726420 is 246271.

It is an interprime number because it is at equal distance from previous prime (1726411) and next prime (1726429).

It can be written as a sum of positive squares in 4 ways, for example, as 352836 + 1373584 = 594^2 + 1172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1726391 and 1726400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1726429) 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, 427 + ... + 1906.

It is an arithmetic number, because the mean of its divisors is an integer number (155211).

2^1726420 is an apocalyptic number.

1726420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1726420 is an abundant number, since it is smaller than the sum of its proper divisors (1998644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1726420 is a wasteful number, since it uses less digits than its factorization.

1726420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1726420 is about 1313.9330272126. The cubic root of 1726420 is about 119.9634147731.

The spelling of 1726420 in words is "one million, seven hundred twenty-six thousand, four hundred twenty".