1204021261 has 8 divisors (see below), whose sum is σ = 1209184704. Its totient is φ = 1198866720.

The previous prime is 1204021237. The next prime is 1204021267. The reversal of 1204021261 is 1621204021.

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

It is a cyclic number.

It is not a de Polignac number, because 1204021261 - 2⁵ = 1204021229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204021267) 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, 442441 + ... + 445153.

It is an arithmetic number, because the mean of its divisors is an integer number (151148088).

Almost surely, 2^1204021261 is an apocalyptic number.

It is an amenable number.

1204021261 is a deficient number, since it is larger than the sum of its proper divisors (5163443).

1204021261 is a wasteful number, since it uses less digits than its factorization.

1204021261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1204021261 is about 34699.0095103592. The cubic root of 1204021261 is about 1063.8442533658.

Adding to 1204021261 its reverse (1621204021), we get a palindrome (2825225282).

The spelling of 1204021261 in words is "one billion, two hundred four million, twenty-one thousand, two hundred sixty-one".