125221242 has 16 divisors (see below), whose sum is σ = 250552800. Its totient is φ = 41722032.

The previous prime is 125221237. The next prime is 125221247. The reversal of 125221242 is 242122521.

It is an interprime number because it is at equal distance from previous prime (125221237) and next prime (125221247).

It is not an unprimeable number, because it can be changed into a prime (125221247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22009 + ... + 27107.

It is an arithmetic number, because the mean of its divisors is an integer number (15659550).

Almost surely, 2^125221242 is an apocalyptic number.

125221242 is an abundant number, since it is smaller than the sum of its proper divisors (125331558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125221242 is a wasteful number, since it uses less digits than its factorization.

125221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9197.

The product of its digits is 640, while the sum is 21.

The square root of 125221242 is about 11190.2297563544. The cubic root of 125221242 is about 500.2948154668.

Adding to 125221242 its reverse (242122521), we get a palindrome (367343763).

The spelling of 125221242 in words is "one hundred twenty-five million, two hundred twenty-one thousand, two hundred forty-two".