1201844981 has 8 divisors (see below), whose sum is σ = 1267224000. Its totient is φ = 1136678400.

The previous prime is 1201844951. The next prime is 1201845011. The reversal of 1201844981 is 1894481021.

It is an interprime number because it is at equal distance from previous prime (1201844951) and next prime (1201845011).

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 1201844981 - 2¹⁰ = 1201843957 is a prime.

It is a super-2 number, since 2×1201844981² = 2888862716709780722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201844951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41420 + ... + 64181.

It is an arithmetic number, because the mean of its divisors is an integer number (158403000).

Almost surely, 2^1201844981 is an apocalyptic number.

It is an amenable number.

1201844981 is a deficient number, since it is larger than the sum of its proper divisors (65379019).

1201844981 is a wasteful number, since it uses less digits than its factorization.

1201844981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106219.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1201844981 is about 34667.6359303602. The cubic root of 1201844981 is about 1063.2028972208.

The spelling of 1201844981 in words is "one billion, two hundred one million, eight hundred forty-four thousand, nine hundred eighty-one".