126216025 has 24 divisors (see below), whose sum is σ = 170614080. Its totient is φ = 92063040.

The previous prime is 126216001. The next prime is 126216037. The reversal of 126216025 is 520612621.

It is not a de Polignac number, because 126216025 - 2¹¹ = 126213977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24636 + ... + 29314.

It is an arithmetic number, because the mean of its divisors is an integer number (7108920).

Almost surely, 2^126216025 is an apocalyptic number.

It is an amenable number.

126216025 is a deficient number, since it is larger than the sum of its proper divisors (44398055).

126216025 is a wasteful number, since it uses less digits than its factorization.

126216025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785 (or 4780 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 126216025 is about 11234.5905577373. The cubic root of 126216025 is about 501.6161372393.

Adding to 126216025 its reverse (520612621), we get a palindrome (646828646).

The spelling of 126216025 in words is "one hundred twenty-six million, two hundred sixteen thousand, twenty-five".