1457820 has 144 divisors (see below), whose sum is σ = 5503680. Its totient is φ = 304128.

The previous prime is 1457803. The next prime is 1457821. The reversal of 1457820 is 287541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1457821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16336 + ... + 16424.

It is an arithmetic number, because the mean of its divisors is an integer number (38220).

2^1457820 is an apocalyptic number.

1457820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1457820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2751840).

1457820 is an abundant number, since it is smaller than the sum of its proper divisors (4045860).

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

1457820 is a wasteful number, since it uses less digits than its factorization.

1457820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1457820 is about 1207.4021699500. The cubic root of 1457820 is about 113.3882279242.

The spelling of 1457820 in words is "one million, four hundred fifty-seven thousand, eight hundred twenty".