201291457 has 2 divisors, whose sum is σ = 201291458. Its totient is φ = 201291456.

The previous prime is 201291443. The next prime is 201291487. The reversal of 201291457 is 754192102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176996416 + 24295041 = 13304^2 + 4929^2 .

It is a cyclic number.

It is not a de Polignac number, because 201291457 - 2¹¹ = 201289409 is a prime.

It is a super-2 number, since 2×201291457² = 81036501322365698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201291437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100645728 + 100645729.

It is an arithmetic number, because the mean of its divisors is an integer number (100645729).

Almost surely, 2^201291457 is an apocalyptic number.

It is an amenable number.

201291457 is a deficient number, since it is larger than the sum of its proper divisors (1).

201291457 is an equidigital number, since it uses as much as digits as its factorization.

201291457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 201291457 is about 14187.7220511258. The cubic root of 201291457 is about 586.0595956816.

The spelling of 201291457 in words is "two hundred one million, two hundred ninety-one thousand, four hundred fifty-seven".