134381569 has 20 divisors (see below), whose sum is σ = 158659844. Its totient is φ = 113799168.

The previous prime is 134381567. The next prime is 134381581. The reversal of 134381569 is 965183431.

It can be written as a sum of positive squares in 2 ways, for example, as 107910544 + 26471025 = 10388^2 + 5145^2 .

It is not a de Polignac number, because 134381569 - 2¹ = 134381567 is a prime.

It is a super-2 number, since 2×134381569² = 36116812173803522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (134381561) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 232609 + ... + 233185.

It is a Proth number, since it is equal to 4101 ⋅ 2¹⁵ + 1 and 4101 < 2¹⁵.

Almost surely, 2^134381569 is an apocalyptic number.

It is an amenable number.

134381569 is a deficient number, since it is larger than the sum of its proper divisors (24278275).

134381569 is an frugal number, since it uses more digits than its factorization.

134381569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 681 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 134381569 is about 11592.3064573018. The cubic root of 134381569 is about 512.2082498903.

The spelling of 134381569 in words is "one hundred thirty-four million, three hundred eighty-one thousand, five hundred sixty-nine".