42523025 has 6 divisors (see below), whose sum is σ = 52728582. Its totient is φ = 34018400.

The previous prime is 42523009. The next prime is 42523031. The reversal of 42523025 is 52032524.

It can be written as a sum of positive squares in 3 ways, for example, as 3297856 + 39225169 = 1816^2 + 6263^2 .

It is not a de Polignac number, because 42523025 - 2⁴ = 42523009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850436 + ... + 850485.

It is an arithmetic number, because the mean of its divisors is an integer number (8788097).

Almost surely, 2^42523025 is an apocalyptic number.

It is an amenable number.

42523025 is a deficient number, since it is larger than the sum of its proper divisors (10205557).

42523025 is a wasteful number, since it uses less digits than its factorization.

42523025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700931 (or 1700926 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 42523025 is about 6520.9681029737. The cubic root of 42523025 is about 349.0396120368.

Adding to 42523025 its reverse (52032524), we get a palindrome (94555549).

The spelling of 42523025 in words is "forty-two million, five hundred twenty-three thousand, twenty-five".