142940501 has 4 divisors (see below), whose sum is σ = 155935104. Its totient is φ = 129945900.

The previous prime is 142940491. The next prime is 142940503. The reversal of 142940501 is 105049241.

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 a de Polignac number, because none of the positive numbers 2^k-142940501 is a prime.

It is a super-2 number, since 2×142940501² = 40863973652262002, which contains 22 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 (142940503) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6497285 + ... + 6497306.

It is an arithmetic number, because the mean of its divisors is an integer number (38983776).

Almost surely, 2^142940501 is an apocalyptic number.

142940501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142940501 is a deficient number, since it is larger than the sum of its proper divisors (12994603).

142940501 is a wasteful number, since it uses less digits than its factorization.

142940501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12994602.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 142940501 is about 11955.7727061031. The cubic root of 142940501 is about 522.8596164473.

Adding to 142940501 its reverse (105049241), we get a palindrome (247989742).

The spelling of 142940501 in words is "one hundred forty-two million, nine hundred forty thousand, five hundred one".