152143921 has 4 divisors (see below), whose sum is σ = 152229744. Its totient is φ = 152058100.

The previous prime is 152143909. The next prime is 152143951. The reversal of 152143921 is 129341251.

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 152143921 - 2¹⁵ = 152111153 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 152143921.

It is not an unprimeable number, because it can be changed into a prime (152143951) 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, 40195 + ... + 43816.

It is an arithmetic number, because the mean of its divisors is an integer number (38057436).

Almost surely, 2^152143921 is an apocalyptic number.

It is an amenable number.

152143921 is a deficient number, since it is larger than the sum of its proper divisors (85823).

152143921 is an equidigital number, since it uses as much as digits as its factorization.

152143921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85822.

The product of its digits is 2160, while the sum is 28.

The square root of 152143921 is about 12334.6633922454. The cubic root of 152143921 is about 533.8487147832.

The spelling of 152143921 in words is "one hundred fifty-two million, one hundred forty-three thousand, nine hundred twenty-one".