87025121 has 2 divisors, whose sum is σ = 87025122. Its totient is φ = 87025120.

The previous prime is 87025117. The next prime is 87025151. The reversal of 87025121 is 12152078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86285521 + 739600 = 9289^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 87025121 - 2² = 87025117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87025151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43512560 + 43512561.

It is an arithmetic number, because the mean of its divisors is an integer number (43512561).

Almost surely, 2^87025121 is an apocalyptic number.

It is an amenable number.

87025121 is a deficient number, since it is larger than the sum of its proper divisors (1).

87025121 is an equidigital number, since it uses as much as digits as its factorization.

87025121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 87025121 is about 9328.7255828436. The cubic root of 87025121 is about 443.1474064741.

Adding to 87025121 its reverse (12152078), we get a palindrome (99177199).

It can be divided in two parts, 87025 and 121, that multiplied together give a square (10530025 = 3245²).

The spelling of 87025121 in words is "eighty-seven million, twenty-five thousand, one hundred twenty-one".