2521545 has 32 divisors (see below), whose sum is σ = 4432512. Its totient is φ = 1216512.

The previous prime is 2521537. The next prime is 2521591. The reversal of 2521545 is 5451252.

It is a happy number.

It is not a de Polignac number, because 2521545 - 2³ = 2521537 is a prime.

2521545 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12969 + ... + 13161.

It is an arithmetic number, because the mean of its divisors is an integer number (138516).

2^2521545 is an apocalyptic number.

It is an amenable number.

2521545 is a deficient number, since it is larger than the sum of its proper divisors (1910967).

2521545 is a wasteful number, since it uses less digits than its factorization.

2521545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 2000, while the sum is 24.

The square root of 2521545 is about 1587.9373413331. The cubic root of 2521545 is about 136.1096470140.

Adding to 2521545 its reverse (5451252), we get a palindrome (7972797).

The spelling of 2521545 in words is "two million, five hundred twenty-one thousand, five hundred forty-five".