142507621 has 4 divisors (see below), whose sum is σ = 142560000. Its totient is φ = 142455244.

The previous prime is 142507571. The next prime is 142507639. The reversal of 142507621 is 126705241.

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-142507621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142507621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142507691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21871 + ... + 27628.

It is an arithmetic number, because the mean of its divisors is an integer number (35640000).

Almost surely, 2^142507621 is an apocalyptic number.

It is an amenable number.

142507621 is a deficient number, since it is larger than the sum of its proper divisors (52379).

142507621 is an equidigital number, since it uses as much as digits as its factorization.

142507621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52378.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 142507621 is about 11937.6555906091. The cubic root of 142507621 is about 522.3312746269.

The spelling of 142507621 in words is "one hundred forty-two million, five hundred seven thousand, six hundred twenty-one".