1225384870 has 16 divisors (see below), whose sum is σ = 2265306768. Its totient is φ = 476906400.

The previous prime is 1225384861. The next prime is 1225384877. The reversal of 1225384870 is 784835221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225384877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655556 + ... + 1656295.

It is an arithmetic number, because the mean of its divisors is an integer number (141581673).

Almost surely, 2^1225384870 is an apocalyptic number.

1225384870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225384870 is a deficient number, since it is larger than the sum of its proper divisors (1039921898).

1225384870 is a wasteful number, since it uses less digits than its factorization.

1225384870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311895.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 1225384870 is about 35005.4977110739. The cubic root of 1225384870 is about 1070.0995249085.

The spelling of 1225384870 in words is "one billion, two hundred twenty-five million, three hundred eighty-four thousand, eight hundred seventy".