1225723760 has 20 divisors (see below), whose sum is σ = 2849807928. Its totient is φ = 490289472.

The previous prime is 1225723747. The next prime is 1225723777. The reversal of 1225723760 is 673275221.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1225723760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7660694 + ... + 7660853.

Almost surely, 2^1225723760 is an apocalyptic number.

1225723760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225723760 is an abundant number, since it is smaller than the sum of its proper divisors (1624084168).

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

1225723760 is a wasteful number, since it uses less digits than its factorization.

1225723760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15321560 (or 15321554 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 1225723760 is about 35010.3379018255. The cubic root of 1225723760 is about 1070.1981640140.

Adding to 1225723760 its reverse (673275221), we get a palindrome (1898998981).

The spelling of 1225723760 in words is "one billion, two hundred twenty-five million, seven hundred twenty-three thousand, seven hundred sixty".