4187532121 has 2 divisors, whose sum is σ = 4187532122. Its totient is φ = 4187532120.

The previous prime is 4187532119. The next prime is 4187532137. The reversal of 4187532121 is 1212357814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4078099600 + 109432521 = 63860^2 + 10461^2 .

It is a cyclic number.

It is not a de Polignac number, because 4187532121 - 2¹ = 4187532119 is a prime.

Together with 4187532119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4187532101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2093766060 + 2093766061.

It is an arithmetic number, because the mean of its divisors is an integer number (2093766061).

Almost surely, 2^4187532121 is an apocalyptic number.

It is an amenable number.

4187532121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4187532121 is an equidigital number, since it uses as much as digits as its factorization.

4187532121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 4187532121 is about 64711.1437157465. The cubic root of 4187532121 is about 1611.8305530780.

Adding to 4187532121 its reverse (1212357814), we get a palindrome (5399889935).

The spelling of 4187532121 in words is "four billion, one hundred eighty-seven million, five hundred thirty-two thousand, one hundred twenty-one".