1201798731 has 64 divisors (see below), whose sum is σ = 2021400576. Its totient is φ = 619960320.

The previous prime is 1201798729. The next prime is 1201798771. The reversal of 1201798731 is 1378971021.

It is not a de Polignac number, because 1201798731 - 2¹ = 1201798729 is a prime.

It is a super-2 number, since 2×1201798731² = 2888640379666420722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1201798731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201798771) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10635331 + ... + 10635443.

It is an arithmetic number, because the mean of its divisors is an integer number (31584384).

Almost surely, 2^1201798731 is an apocalyptic number.

1201798731 is a deficient number, since it is larger than the sum of its proper divisors (819601845).

1201798731 is an equidigital number, since it uses as much as digits as its factorization.

1201798731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 1201798731 is about 34666.9688752853. The cubic root of 1201798731 is about 1063.1892588106.

The spelling of 1201798731 in words is "one billion, two hundred one million, seven hundred ninety-eight thousand, seven hundred thirty-one".