135978001 has 8 divisors (see below), whose sum is σ = 142914240. Its totient is φ = 129127152.

The previous prime is 135977983. The next prime is 135978043. The reversal of 135978001 is 100879531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135978001 - 2¹⁹ = 135453713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135978091) 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 7 ways as a sum of consecutive naturals, for example, 18070 + ... + 24463.

It is an arithmetic number, because the mean of its divisors is an integer number (17864280).

Almost surely, 2^135978001 is an apocalyptic number.

It is an amenable number.

135978001 is a deficient number, since it is larger than the sum of its proper divisors (6936239).

135978001 is a wasteful number, since it uses less digits than its factorization.

135978001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42695.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 135978001 is about 11660.9605522015. The cubic root of 135978001 is about 514.2285883895.

The spelling of 135978001 in words is "one hundred thirty-five million, nine hundred seventy-eight thousand, one".