142001761 has 4 divisors (see below), whose sum is σ = 154911024. Its totient is φ = 129092500.

The previous prime is 142001749. The next prime is 142001767. The reversal of 142001761 is 167100241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142001761 - 2⁵ = 142001729 is a prime.

It is a super-4 number, since 4×142001761⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142001767) 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 3 ways as a sum of consecutive naturals, for example, 6454615 + ... + 6454636.

It is an arithmetic number, because the mean of its divisors is an integer number (38727756).

Almost surely, 2^142001761 is an apocalyptic number.

142001761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142001761 is a deficient number, since it is larger than the sum of its proper divisors (12909263).

142001761 is a wasteful number, since it uses less digits than its factorization.

142001761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12909262.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 142001761 is about 11916.4491775025. The cubic root of 142001761 is about 521.7125012664.

The spelling of 142001761 in words is "one hundred forty-two million, one thousand, seven hundred sixty-one".