1958172 has 12 divisors (see below), whose sum is σ = 4569096. Its totient is φ = 652720.

The previous prime is 1958137. The next prime is 1958183. The reversal of 1958172 is 2718591.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 81579 + ... + 81602.

It is an arithmetic number, because the mean of its divisors is an integer number (380758).

2^1958172 is an apocalyptic number.

1958172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1958172 is an abundant number, since it is smaller than the sum of its proper divisors (2610924).

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

1958172 is a wasteful number, since it uses less digits than its factorization.

1958172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163188 (or 163186 counting only the distinct ones).

The product of its digits is 5040, while the sum is 33.

The square root of 1958172 is about 1399.3469905638. The cubic root of 1958172 is about 125.1075767248.

The spelling of 1958172 in words is "one million, nine hundred fifty-eight thousand, one hundred seventy-two".