201145542 has 32 divisors (see below), whose sum is σ = 444952032. Its totient is φ = 60217344.

The previous prime is 201145541. The next prime is 201145561. The reversal of 201145542 is 245541102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201145541) 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, 31963 + ... + 37734.

It is an arithmetic number, because the mean of its divisors is an integer number (13904751).

Almost surely, 2^201145542 is an apocalyptic number.

201145542 is an abundant number, since it is smaller than the sum of its proper divisors (243806490).

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

201145542 is a wasteful number, since it uses less digits than its factorization.

201145542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69752.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 201145542 is about 14182.5788205107. The cubic root of 201145542 is about 585.9179510591.

Adding to 201145542 its reverse (245541102), we get a palindrome (446686644).

The spelling of 201145542 in words is "two hundred one million, one hundred forty-five thousand, five hundred forty-two".