135861451 has 4 divisors (see below), whose sum is σ = 148212504. Its totient is φ = 123510400.

The previous prime is 135861421. The next prime is 135861469. The reversal of 135861451 is 154168531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154168531 = 11 ⋅14015321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135861451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135861421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6175510 + ... + 6175531.

It is an arithmetic number, because the mean of its divisors is an integer number (37053126).

Almost surely, 2^135861451 is an apocalyptic number.

135861451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135861451 is a deficient number, since it is larger than the sum of its proper divisors (12351053).

135861451 is a wasteful number, since it uses less digits than its factorization.

135861451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12351052.

The product of its digits is 14400, while the sum is 34.

The square root of 135861451 is about 11655.9620366575. The cubic root of 135861451 is about 514.0816271822.

The spelling of 135861451 in words is "one hundred thirty-five million, eight hundred sixty-one thousand, four hundred fifty-one".