1225646402 has 8 divisors (see below), whose sum is σ = 1918403136. Its totient is φ = 586178692.

The previous prime is 1225646377. The next prime is 1225646407. The reversal of 1225646402 is 2046465221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1225646407) 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, 13322198 + ... + 13322289.

It is an arithmetic number, because the mean of its divisors is an integer number (239800392).

Almost surely, 2^1225646402 is an apocalyptic number.

1225646402 is a deficient number, since it is larger than the sum of its proper divisors (692756734).

1225646402 is a wasteful number, since it uses less digits than its factorization.

1225646402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26644512.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1225646402 is about 35009.2330964276. The cubic root of 1225646402 is about 1070.1756493893.

The spelling of 1225646402 in words is "one billion, two hundred twenty-five million, six hundred forty-six thousand, four hundred two".