201772142 has 24 divisors (see below), whose sum is σ = 357530760. Its totient is φ = 84658080.

The previous prime is 201772141. The next prime is 201772163. The reversal of 201772142 is 241277102.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201772141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23417 + ... + 30852.

It is an arithmetic number, because the mean of its divisors is an integer number (14897115).

Almost surely, 2^201772142 is an apocalyptic number.

201772142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201772142 is a deficient number, since it is larger than the sum of its proper divisors (155758618).

201772142 is a wasteful number, since it uses less digits than its factorization.

201772142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54308 (or 54295 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 201772142 is about 14204.6521252722. The cubic root of 201772142 is about 586.5257292445.

The spelling of 201772142 in words is "two hundred one million, seven hundred seventy-two thousand, one hundred forty-two".