133642530 has 48 divisors (see below), whose sum is σ = 397111104. Its totient is φ = 30546720.

The previous prime is 133642513. The next prime is 133642577. The reversal of 133642530 is 35246331.

It is a happy number.

133642530 is a `hidden beast` number, since 13 + 3 + 642 + 5 + 3 + 0 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133642494 and 133642503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105436 + ... + 106695.

It is an arithmetic number, because the mean of its divisors is an integer number (8273148).

Almost surely, 2^133642530 is an apocalyptic number.

133642530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133642530 is an abundant number, since it is smaller than the sum of its proper divisors (263468574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133642530 is a wasteful number, since it uses less digits than its factorization.

133642530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212151 (or 212148 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 133642530 is about 11560.3862392223. The cubic root of 133642530 is about 511.2675506038.

Adding to 133642530 its reverse (35246331), we get a palindrome (168888861).

The spelling of 133642530 in words is "one hundred thirty-three million, six hundred forty-two thousand, five hundred thirty".