201451142 has 4 divisors (see below), whose sum is σ = 302176716. Its totient is φ = 100725570.

The previous prime is 201451127. The next prime is 201451169. The reversal of 201451142 is 241154102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×201451142² = 81165125226208328, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 50362784 + ... + 50362787.

It is an arithmetic number, because the mean of its divisors is an integer number (75544179).

Almost surely, 2^201451142 is an apocalyptic number.

201451142 is a deficient number, since it is larger than the sum of its proper divisors (100725574).

201451142 is a wasteful number, since it uses less digits than its factorization.

201451142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100725573.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 201451142 is about 14193.3485125956. The cubic root of 201451142 is about 586.2145288844.

The spelling of 201451142 in words is "two hundred one million, four hundred fifty-one thousand, one hundred forty-two".