1225572620 has 12 divisors (see below), whose sum is σ = 2573702544. Its totient is φ = 490229040.

The previous prime is 1225572617. The next prime is 1225572629. The reversal of 1225572620 is 262755221.

It is not an unprimeable number, because it can be changed into a prime (1225572629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30639296 + ... + 30639335.

It is an arithmetic number, because the mean of its divisors is an integer number (214475212).

Almost surely, 2^1225572620 is an apocalyptic number.

1225572620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225572620 is an abundant number, since it is smaller than the sum of its proper divisors (1348129924).

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

1225572620 is a wasteful number, since it uses less digits than its factorization.

1225572620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61278640 (or 61278638 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 1225572620 is about 35008.1793299794. The cubic root of 1225572620 is about 1070.1541746572.

The spelling of 1225572620 in words is "one billion, two hundred twenty-five million, five hundred seventy-two thousand, six hundred twenty".