135041621 has 16 divisors (see below), whose sum is σ = 159001920. Its totient is φ = 113070720.

The previous prime is 135041609. The next prime is 135041633. The reversal of 135041621 is 126140531.

It is an interprime number because it is at equal distance from previous prime (135041609) and next prime (135041633).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135041621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135041651) 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, 93521 + ... + 94953.

It is an arithmetic number, because the mean of its divisors is an integer number (9937620).

Almost surely, 2^135041621 is an apocalyptic number.

135041621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135041621 is a deficient number, since it is larger than the sum of its proper divisors (23960299).

135041621 is a wasteful number, since it uses less digits than its factorization.

135041621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 135041621 is about 11620.7409832592. The cubic root of 135041621 is about 513.0454977779.

The spelling of 135041621 in words is "one hundred thirty-five million, forty-one thousand, six hundred twenty-one".