134861921 has 2 divisors, whose sum is σ = 134861922. Its totient is φ = 134861920.

The previous prime is 134861891. The next prime is 134861953. The reversal of 134861921 is 129168431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126247696 + 8614225 = 11236^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 134861921 - 2²⁶ = 67753057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134863921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67430960 + 67430961.

It is an arithmetic number, because the mean of its divisors is an integer number (67430961).

Almost surely, 2^134861921 is an apocalyptic number.

It is an amenable number.

134861921 is a deficient number, since it is larger than the sum of its proper divisors (1).

134861921 is an equidigital number, since it uses as much as digits as its factorization.

134861921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 134861921 is about 11613.0065443881. The cubic root of 134861921 is about 512.8178267338.

The spelling of 134861921 in words is "one hundred thirty-four million, eight hundred sixty-one thousand, nine hundred twenty-one".