134621257 has 2 divisors, whose sum is σ = 134621258. Its totient is φ = 134621256.

The previous prime is 134621239. The next prime is 134621273. The reversal of 134621257 is 752126431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115863696 + 18757561 = 10764^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 134621257 - 2⁷ = 134621129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134621287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67310628 + 67310629.

It is an arithmetic number, because the mean of its divisors is an integer number (67310629).

Almost surely, 2^134621257 is an apocalyptic number.

It is an amenable number.

134621257 is a deficient number, since it is larger than the sum of its proper divisors (1).

134621257 is an equidigital number, since it uses as much as digits as its factorization.

134621257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 134621257 is about 11602.6400874973. The cubic root of 134621257 is about 512.5126002851.

Adding to 134621257 its reverse (752126431), we get a palindrome (886747688).

The spelling of 134621257 in words is "one hundred thirty-four million, six hundred twenty-one thousand, two hundred fifty-seven".