1957591 has 2 divisors, whose sum is σ = 1957592. Its totient is φ = 1957590.

The previous prime is 1957583. The next prime is 1957621.

It is a happy number.

1957591 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1957591 - 2³ = 1957583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1957591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978795 + 978796.

It is an arithmetic number, because the mean of its divisors is an integer number (978796).

2^1957591 is an apocalyptic number.

1957591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957591 is an equidigital number, since it uses as much as digits as its factorization.

1957591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14175, while the sum is 37.

The square root of 1957591 is about 1399.1393783323. The cubic root of 1957591 is about 125.0952021407.

The spelling of 1957591 in words is "one million, nine hundred fifty-seven thousand, five hundred ninety-one".