1261375 has 8 divisors (see below), whose sum is σ = 1574352.
Its totient is φ = 1009000.
The previous prime is 1261373. The next prime is 1261387. The reversal of 1261375 is 5731621.
Adding to 1261375 its reverse (5731621), we get a palindrome (6992996).
It is not a de Polignac number, because 1261375 - 21 = 1261373 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (25).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1261373) 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, 4921 + ... + 5170.
It is an arithmetic number, because the mean of its divisors is an integer number (196794).
21261375 is an apocalyptic number.
1261375 is a deficient number, since it is larger than the sum of its proper divisors (312977).
1261375 is an equidigital number, since it uses as much as digits as its factorization.
1261375 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10106 (or 10096 counting only the distinct ones).
The product of its digits is 1260, while the sum is 25.
The square root of 1261375 is about 1123.1095227092.
The cubic root of 1261375 is about 108.0475042506.
The spelling of 1261375 in words is "one million, two hundred sixty-one thousand, three hundred seventy-five".