2500121 has 4 divisors (see below), whose sum is σ = 2692452. Its totient is φ = 2307792.

The previous prime is 2500117. The next prime is 2500151. The reversal of 2500121 is 1210052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 440896 + 2059225 = 664^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500121 - 2² = 2500117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2500151) 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, 96146 + ... + 96171.

It is an arithmetic number, because the mean of its divisors is an integer number (673113).

2^2500121 is an apocalyptic number.

It is an amenable number.

2500121 is a deficient number, since it is larger than the sum of its proper divisors (192331).

2500121 is a wasteful number, since it uses less digits than its factorization.

2500121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192330.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2500121 is about 1581.1770931809. The cubic root of 2500121 is about 135.7230704246.

Adding to 2500121 its reverse (1210052), we get a palindrome (3710173).

It can be divided in two parts, 2500 and 121, that multiplied together give a square (302500 = 550²).

The spelling of 2500121 in words is "two million, five hundred thousand, one hundred twenty-one".