1204138642 has 96 divisors (see below), whose sum is σ = 2384916480. Its totient is φ = 452057760.

The previous prime is 1204138631. The next prime is 1204138651. The reversal of 1204138642 is 2468314021.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1327153 + ... + 1328059.

It is an arithmetic number, because the mean of its divisors is an integer number (24842880).

Almost surely, 2^1204138642 is an apocalyptic number.

1204138642 is a deficient number, since it is larger than the sum of its proper divisors (1180777838).

1204138642 is a wasteful number, since it uses less digits than its factorization.

1204138642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1204138642 is about 34700.7008862933. The cubic root of 1204138642 is about 1063.8788239194.

The spelling of 1204138642 in words is "one billion, two hundred four million, one hundred thirty-eight thousand, six hundred forty-two".