1258172 has 6 divisors (see below), whose sum is σ = 2201808. Its totient is φ = 629084.

The previous prime is 1258171. The next prime is 1258177. The reversal of 1258172 is 2718521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258171) 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 as a sum of consecutive naturals, namely, 157268 + ... + 157275.

It is an arithmetic number, because the mean of its divisors is an integer number (366968).

2^1258172 is an apocalyptic number.

It is an amenable number.

1258172 is a deficient number, since it is larger than the sum of its proper divisors (943636).

1258172 is a wasteful number, since it uses less digits than its factorization.

1258172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314547 (or 314545 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 1258172 is about 1121.6826645714. The cubic root of 1258172 is about 107.9559719942.

The spelling of 1258172 in words is "one million, two hundred fifty-eight thousand, one hundred seventy-two".