1954157 has 2 divisors, whose sum is σ = 1954158. Its totient is φ = 1954156.

The previous prime is 1954153. The next prime is 1954159. The reversal of 1954157 is 7514591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 763876 = 1091^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954157 - 2² = 1954153 is a prime.

Together with 1954159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1954151) 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 as a sum of consecutive naturals, namely, 977078 + 977079.

It is an arithmetic number, because the mean of its divisors is an integer number (977079).

2^1954157 is an apocalyptic number.

It is an amenable number.

1954157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954157 is an equidigital number, since it uses as much as digits as its factorization.

1954157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 1954157 is about 1397.9116567223. The cubic root of 1954157 is about 125.0220121235.

The spelling of 1954157 in words is "one million, nine hundred fifty-four thousand, one hundred fifty-seven".