134587021 has 2 divisors, whose sum is σ = 134587022. Its totient is φ = 134587020.

The previous prime is 134587003. The next prime is 134587043. The reversal of 134587021 is 120785431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 58216900 = 8739^2 + 7630^2 .

It is a cyclic number.

It is not a de Polignac number, because 134587021 - 2⁵ = 134586989 is a prime.

It is a super-2 number, since 2×134587021² = 36227332443308882, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7623328 and since 134587021 and 7623328 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134581021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67293510 + 67293511.

It is an arithmetic number, because the mean of its divisors is an integer number (67293511).

Almost surely, 2^134587021 is an apocalyptic number.

It is an amenable number.

134587021 is a deficient number, since it is larger than the sum of its proper divisors (1).

134587021 is an equidigital number, since it uses as much as digits as its factorization.

134587021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 134587021 is about 11601.1646398110. The cubic root of 134587021 is about 512.4691503144.

The spelling of 134587021 in words is "one hundred thirty-four million, five hundred eighty-seven thousand, twenty-one".