1225243403164 has 24 divisors (see below), whose sum is σ = 2402319992688. Its totient is φ = 541876688640.

The previous prime is 1225243403149. The next prime is 1225243403207. The reversal of 1225243403164 is 4613043425221.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376301629 + ... + 376304884.

It is an arithmetic number, because the mean of its divisors is an integer number (100096666362).

Almost surely, 2^{1225243403164} is an apocalyptic number.

It is an amenable number.

1225243403164 is a deficient number, since it is larger than the sum of its proper divisors (1177076589524).

1225243403164 is a wasteful number, since it uses less digits than its factorization.

1225243403164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752606565 (or 752606563 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 1225243403164 its reverse (4613043425221), we get a palindrome (5838286828385).

The spelling of 1225243403164 in words is "one trillion, two hundred twenty-five billion, two hundred forty-three million, four hundred three thousand, one hundred sixty-four".