1375720 has 32 divisors (see below), whose sum is σ = 3129120. Its totient is φ = 544320.

The previous prime is 1375709. The next prime is 1375723. The reversal of 1375720 is 275731.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6415 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (97785).

2^1375720 is an apocalyptic number.

1375720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1375720 is an abundant number, since it is smaller than the sum of its proper divisors (1753400).

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

1375720 is a wasteful number, since it uses less digits than its factorization.

1375720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 1375720 is about 1172.9109088077. The cubic root of 1375720 is about 111.2184104224.

The spelling of 1375720 in words is "one million, three hundred seventy-five thousand, seven hundred twenty".