2528397 has 6 divisors (see below), whose sum is σ = 3652142. Its totient is φ = 1685592.

The previous prime is 2528377. The next prime is 2528399. The reversal of 2528397 is 7938252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1929321 + 599076 = 1389^2 + 774^2 .

It is not a de Polignac number, because 2528397 - 2⁷ = 2528269 is a prime.

It is a super-3 number, since 3×2528397³ = 48490543713339680319, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140458 + ... + 140475.

2^2528397 is an apocalyptic number.

It is an amenable number.

2528397 is a deficient number, since it is larger than the sum of its proper divisors (1123745).

2528397 is a wasteful number, since it uses less digits than its factorization.

2528397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280939 (or 280936 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2528397 is about 1590.0933934835. The cubic root of 2528397 is about 136.2328227932.

It can be divided in two parts, 252 and 8397, that added together give a square (8649 = 93²).

The spelling of 2528397 in words is "two million, five hundred twenty-eight thousand, three hundred ninety-seven".