1225440402 has 32 divisors (see below), whose sum is σ = 2525994240. Its totient is φ = 396098640.

The previous prime is 1225440371. The next prime is 1225440467. The reversal of 1225440402 is 2040445221.

It is a happy number.

It is an unprimeable number.

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, 18777 + ... + 52947.

It is an arithmetic number, because the mean of its divisors is an integer number (78937320).

Almost surely, 2^1225440402 is an apocalyptic number.

1225440402 is an abundant number, since it is smaller than the sum of its proper divisors (1300553838).

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

1225440402 is a wasteful number, since it uses less digits than its factorization.

1225440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34358.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1225440402 is about 35006.2908917812. The cubic root of 1225440402 is about 1070.1156895902.

Adding to 1225440402 its reverse (2040445221), we get a palindrome (3265885623).

The spelling of 1225440402 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, four hundred two".