201542406 has 16 divisors (see below), whose sum is σ = 434091504. Its totient is φ = 62013024.

The previous prime is 201542401. The next prime is 201542477. The reversal of 201542406 is 604245102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201542401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291861 + ... + 1292016.

It is an arithmetic number, because the mean of its divisors is an integer number (27130719).

Almost surely, 2^201542406 is an apocalyptic number.

201542406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

201542406 is an abundant number, since it is smaller than the sum of its proper divisors (232549098).

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

201542406 is a wasteful number, since it uses less digits than its factorization.

201542406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583895.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 201542406 is about 14196.5631756422. The cubic root of 201542406 is about 586.3030403470.

Adding to 201542406 its reverse (604245102), we get a palindrome (805787508).

The spelling of 201542406 in words is "two hundred one million, five hundred forty-two thousand, four hundred six".