1957213 has 4 divisors (see below), whose sum is σ = 1967548. Its totient is φ = 1946880.

The previous prime is 1957187. The next prime is 1957243. The reversal of 1957213 is 3127591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3127591 = 971 ⋅3221.

It can be written as a sum of positive squares in 2 ways, for example, as 412164 + 1545049 = 642^2 + 1243^2 .

It is a cyclic number.

It is not a de Polignac number, because 1957213 - 2¹⁷ = 1826141 is a prime.

It is a Duffinian number.

1957213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4878 + ... + 5263.

It is an arithmetic number, because the mean of its divisors is an integer number (491887).

2^1957213 is an apocalyptic number.

It is an amenable number.

1957213 is a deficient number, since it is larger than the sum of its proper divisors (10335).

1957213 is a wasteful number, since it uses less digits than its factorization.

1957213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334.

The product of its digits is 1890, while the sum is 28.

The square root of 1957213 is about 1399.0042887711. The cubic root of 1957213 is about 125.0871498917.

The spelling of 1957213 in words is "one million, nine hundred fifty-seven thousand, two hundred thirteen".