201534642 has 20 divisors (see below), whose sum is σ = 451587246. Its totient is φ = 67178160.

The previous prime is 201534611. The next prime is 201534701. The reversal of 201534642 is 246435102.

201534642 is a `hidden beast` number, since 2 + 0 + 15 + 3 + 4 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 182007081 + 19527561 = 13491^2 + 4419^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 621859 + ... + 622182.

Almost surely, 2^201534642 is an apocalyptic number.

201534642 is an abundant number, since it is smaller than the sum of its proper divisors (250052604).

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

201534642 is a wasteful number, since it uses less digits than its factorization.

201534642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244055 (or 1244046 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 201534642 is about 14196.2897265447. The cubic root of 201534642 is about 586.2955115505.

Adding to 201534642 its reverse (246435102), we get a palindrome (447969744).

The spelling of 201534642 in words is "two hundred one million, five hundred thirty-four thousand, six hundred forty-two".