142421767 has 4 divisors (see below), whose sum is σ = 150799536. Its totient is φ = 134044000.

The previous prime is 142421761. The next prime is 142421779. The reversal of 142421767 is 767124241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 142421767 - 2¹⁵ = 142388999 is a prime.

It is a super-3 number, since 3×142421767³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142421761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4188859 + ... + 4188892.

It is an arithmetic number, because the mean of its divisors is an integer number (37699884).

Almost surely, 2^142421767 is an apocalyptic number.

142421767 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

142421767 is a deficient number, since it is larger than the sum of its proper divisors (8377769).

142421767 is an equidigital number, since it uses as much as digits as its factorization.

142421767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377768.

The product of its digits is 18816, while the sum is 34.

The square root of 142421767 is about 11934.0591166627. The cubic root of 142421767 is about 522.2263603834.

The spelling of 142421767 in words is "one hundred forty-two million, four hundred twenty-one thousand, seven hundred sixty-seven".