1257102 has 48 divisors (see below), whose sum is σ = 3399552. Its totient is φ = 326160.

The previous prime is 1257089. The next prime is 1257103. The reversal of 1257102 is 2017521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 933 + ... + 1839.

It is an arithmetic number, because the mean of its divisors is an integer number (70824).

2^1257102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699776).

1257102 is an abundant number, since it is smaller than the sum of its proper divisors (2142450).

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

1257102 is a wasteful number, since it uses less digits than its factorization.

1257102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1257102 is about 1121.2056011276. The cubic root of 1257102 is about 107.9253599499.

It can be divided in two parts, 125 and 7102, that added together give a palindrome (7227).

The spelling of 1257102 in words is "one million, two hundred fifty-seven thousand, one hundred two".