1225809704 has 64 divisors (see below), whose sum is σ = 2709624960. Its totient is φ = 508896000.

The previous prime is 1225809691. The next prime is 1225809707. The reversal of 1225809704 is 4079085221.

It is a super-3 number, since 3×1225809704³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225809707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518894 + ... + 521250.

It is an arithmetic number, because the mean of its divisors is an integer number (42337890).

Almost surely, 2^1225809704 is an apocalyptic number.

1225809704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225809704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354812480).

1225809704 is an abundant number, since it is smaller than the sum of its proper divisors (1483815256).

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

1225809704 is a wasteful number, since it uses less digits than its factorization.

1225809704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1225809704 is about 35011.5652892012. The cubic root of 1225809704 is about 1070.2231764364.

The spelling of 1225809704 in words is "one billion, two hundred twenty-five million, eight hundred nine thousand, seven hundred four".