1957147 has 2 divisors, whose sum is σ = 1957148. Its totient is φ = 1957146.

The previous prime is 1957129. The next prime is 1957157. The reversal of 1957147 is 7417591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1957147 - 2¹¹ = 1955099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1957117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978573 + 978574.

It is an arithmetic number, because the mean of its divisors is an integer number (978574).

2^1957147 is an apocalyptic number.

1957147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957147 is an equidigital number, since it uses as much as digits as its factorization.

1957147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 34.

The square root of 1957147 is about 1398.9807003672. The cubic root of 1957147 is about 125.0857438372.

The spelling of 1957147 in words is "one million, nine hundred fifty-seven thousand, one hundred forty-seven".