201025542 has 32 divisors (see below), whose sum is σ = 413411040. Its totient is φ = 65127680.

The previous prime is 201025541. The next prime is 201025547. The reversal of 201025542 is 245520102.

It is a happy number.

It is a super-2 number, since 2×201025542² = 80822537072787528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201025541) 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, 70684 + ... + 73472.

It is an arithmetic number, because the mean of its divisors is an integer number (12919095).

Almost surely, 2^201025542 is an apocalyptic number.

201025542 is an abundant number, since it is smaller than the sum of its proper divisors (212385498).

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

201025542 is a wasteful number, since it uses less digits than its factorization.

201025542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 201025542 is about 14178.3476470285. The cubic root of 201025542 is about 585.8014116618.

Adding to 201025542 its reverse (245520102), we get a palindrome (446545644).

The spelling of 201025542 in words is "two hundred one million, twenty-five thousand, five hundred forty-two".