1242210025 has 81 divisors (see below), whose sum is σ = 1927448901. Its totient is φ = 791743680.

The previous prime is 1242210023. The next prime is 1242210061. The reversal of 1242210025 is 5200122421.

1242210025 = 1³ + 2³ + ... + 265³.

The square root of 1242210025 is 35245.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 9357481 + 1232852544 = 3059^2 + 35112^2 .

It is not a de Polignac number, because 1242210025 - 2¹ = 1242210023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 1242209984 and 1242210011.

It is not an unprimeable number, because it can be changed into a prime (1242210023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 23437899 + ... + 23437951.

Almost surely, 2^1242210025 is an apocalyptic number.

1242210025 is the 35245-th square number.

1242210025 is the 17623-rd centered octagonal number.

It is an amenable number.

1242210025 is a deficient number, since it is larger than the sum of its proper divisors (685238876).

1242210025 is an equidigital number, since it uses as much as digits as its factorization.

1242210025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The cubic root of 1242210025 is about 1074.9749480371.

Adding to 1242210025 its reverse (5200122421), we get a palindrome (6442332446).

The spelling of 1242210025 in words is "one billion, two hundred forty-two million, two hundred ten thousand, twenty-five".