147252121 has 4 divisors (see below), whose sum is σ = 148327092. Its totient is φ = 146177152.

The previous prime is 147252101. The next prime is 147252163. The reversal of 147252121 is 121252741.

147252121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121252741 = 29 ⋅4181129.

It can be written as a sum of positive squares in 2 ways, for example, as 121242121 + 26010000 = 11011^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 147252121 - 2⁵ = 147252089 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147252101) 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, 537280 + ... + 537553.

It is an arithmetic number, because the mean of its divisors is an integer number (37081773).

Almost surely, 2^147252121 is an apocalyptic number.

It is an amenable number.

147252121 is a deficient number, since it is larger than the sum of its proper divisors (1074971).

147252121 is a wasteful number, since it uses less digits than its factorization.

147252121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074970.

The product of its digits is 1120, while the sum is 25.

The square root of 147252121 is about 12134.7484934794. The cubic root of 147252121 is about 528.0647602404.

The spelling of 147252121 in words is "one hundred forty-seven million, two hundred fifty-two thousand, one hundred twenty-one".