1373520 has 80 divisors (see below), whose sum is σ = 4374720. Its totient is φ = 356352.

The previous prime is 1373501. The next prime is 1373521. The reversal of 1373520 is 253731.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14112 + ... + 14208.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

2^1373520 is an apocalyptic number.

1373520 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 1373520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2187360).

1373520 is an abundant number, since it is smaller than the sum of its proper divisors (3001200).

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

1373520 is a wasteful number, since it uses less digits than its factorization.

1373520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 1373520 is about 1171.9726959277. The cubic root of 1373520 is about 111.1590933504.

The spelling of 1373520 in words is "one million, three hundred seventy-three thousand, five hundred twenty".