142319661 has 32 divisors (see below), whose sum is σ = 211171968. Its totient is φ = 84541440.

The previous prime is 142319659. The next prime is 142319677. The reversal of 142319661 is 166913241.

It is not a de Polignac number, because 142319661 - 2¹ = 142319659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142311661) 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 31 ways as a sum of consecutive naturals, for example, 553645 + ... + 553901.

It is an arithmetic number, because the mean of its divisors is an integer number (6599124).

Almost surely, 2^142319661 is an apocalyptic number.

142319661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142319661 is a deficient number, since it is larger than the sum of its proper divisors (68852307).

142319661 is a wasteful number, since it uses less digits than its factorization.

142319661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 7776, while the sum is 33.

The square root of 142319661 is about 11929.7804254731. The cubic root of 142319661 is about 522.1015311672.

The spelling of 142319661 in words is "one hundred forty-two million, three hundred nineteen thousand, six hundred sixty-one".