1200251442 has 32 divisors (see below), whose sum is σ = 2737228032. Its totient is φ = 347583744.

The previous prime is 1200251441. The next prime is 1200251443. The reversal of 1200251442 is 2441520021.

It is an interprime number because it is at equal distance from previous prime (1200251441) and next prime (1200251443).

It is not an unprimeable number, because it can be changed into a prime (1200251441) 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 15 ways as a sum of consecutive naturals, for example, 451258 + ... + 453909.

It is an arithmetic number, because the mean of its divisors is an integer number (85538376).

Almost surely, 2^1200251442 is an apocalyptic number.

1200251442 is an abundant number, since it is smaller than the sum of its proper divisors (1536976590).

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

1200251442 is a wasteful number, since it uses less digits than its factorization.

1200251442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905202.

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

The square root of 1200251442 is about 34644.6452139432. The cubic root of 1200251442 is about 1062.7327853870.

Adding to 1200251442 its reverse (2441520021), we get a palindrome (3641771463).

The spelling of 1200251442 in words is "one billion, two hundred million, two hundred fifty-one thousand, four hundred forty-two".