1957155 has 8 divisors (see below), whose sum is σ = 3131472. Its totient is φ = 1043808.

The previous prime is 1957147. The next prime is 1957157. The reversal of 1957155 is 5517591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1957155 - 2³ = 1957147 is a prime.

It is a d-powerful number, because it can be written as 1 + 9³ + 5³ + 7² + 1 + 5⁵ + 5⁹ .

It is not an unprimeable number, because it can be changed into a prime (1957157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65224 + ... + 65253.

It is an arithmetic number, because the mean of its divisors is an integer number (391434).

2^1957155 is an apocalyptic number.

1957155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1957155 is a deficient number, since it is larger than the sum of its proper divisors (1174317).

1957155 is a wasteful number, since it uses less digits than its factorization.

1957155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130485.

The product of its digits is 7875, while the sum is 33.

The square root of 1957155 is about 1398.9835595889. The cubic root of 1957155 is about 125.0859142697.

It can be divided in two parts, 1957 and 155, that added together give a palindrome (2112).

The spelling of 1957155 in words is "one million, nine hundred fifty-seven thousand, one hundred fifty-five".