134011821 has 16 divisors (see below), whose sum is σ = 184459968. Its totient is φ = 86486400.

The previous prime is 134011819. The next prime is 134011831. The reversal of 134011821 is 128110431.

It is a happy number.

It is not a de Polignac number, because 134011821 - 2¹ = 134011819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134011831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11955 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (11528748).

Almost surely, 2^134011821 is an apocalyptic number.

It is an amenable number.

134011821 is a deficient number, since it is larger than the sum of its proper divisors (50448147).

134011821 is a wasteful number, since it uses less digits than its factorization.

134011821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 134011821 is about 11576.3474809631. The cubic root of 134011821 is about 511.7380417053.

The spelling of 134011821 in words is "one hundred thirty-four million, eleven thousand, eight hundred twenty-one".