1242001025 has 12 divisors (see below), whose sum is σ = 1621138800. Its totient is φ = 941305680.

The previous prime is 1242000997. The next prime is 1242001027. The reversal of 1242001025 is 5201002421.

It is not a de Polignac number, because 1242001025 - 2⁸ = 1242000769 is a prime.

It is a super-2 number, since 2×1242001025² = 3085133092202101250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242000994 and 1242001012.

It is not an unprimeable number, because it can be changed into a prime (1242001027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1306895 + ... + 1307844.

It is an arithmetic number, because the mean of its divisors is an integer number (135094900).

Almost surely, 2^1242001025 is an apocalyptic number.

It is an amenable number.

1242001025 is a deficient number, since it is larger than the sum of its proper divisors (379137775).

1242001025 is a wasteful number, since it uses less digits than its factorization.

1242001025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614768 (or 2614763 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1242001025 is about 35242.0349157083. The cubic root of 1242001025 is about 1074.9146570071.

Adding to 1242001025 its reverse (5201002421), we get a palindrome (6443003446).

The spelling of 1242001025 in words is "one billion, two hundred forty-two million, one thousand, twenty-five".