1225565742 has 16 divisors (see below), whose sum is σ = 2487716352. Its totient is φ = 402424440.

The previous prime is 1225565713. The next prime is 1225565767. The reversal of 1225565742 is 2475655221.

It is a super-2 number, since 2×1225565742² = 3004022775928021128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225565742.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1523934 + ... + 1524737.

It is an arithmetic number, because the mean of its divisors is an integer number (155482272).

Almost surely, 2^1225565742 is an apocalyptic number.

1225565742 is an abundant number, since it is smaller than the sum of its proper divisors (1262150610).

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

1225565742 is a wasteful number, since it uses less digits than its factorization.

1225565742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048743.

The product of its digits is 168000, while the sum is 39.

The square root of 1225565742 is about 35008.0810956556. The cubic root of 1225565742 is about 1070.1521727266.

The spelling of 1225565742 in words is "one billion, two hundred twenty-five million, five hundred sixty-five thousand, seven hundred forty-two".