1372545 has 20 divisors (see below), whose sum is σ = 2461140.
Its totient is φ = 731808.
The previous prime is 1372543. The next prime is 1372549. The reversal of 1372545 is 5452731.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 998001 + 374544 = 999^2 + 612^2
It is not a de Polignac number, because 1372545 - 21 = 1372543 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1372543) by changing a digit.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1290 + ... + 2099.
It is an arithmetic number, because the mean of its divisors is an integer number (123057).
21372545 is an apocalyptic number.
1372545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1372545 is a deficient number, since it is larger than the sum of its proper divisors (1088595).
1372545 is an equidigital number, since it uses as much as digits as its factorization.
1372545 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3406 (or 3397 counting only the distinct ones).
The product of its digits is 4200, while the sum is 27.
The square root of 1372545 is about 1171.5566567606.
The cubic root of 1372545 is about 111.1327848460.
The spelling of 1372545 in words is "one million, three hundred seventy-two thousand, five hundred forty-five".