1201845051 has 12 divisors (see below), whose sum is σ = 1893816600. Its totient is φ = 728390880.

The previous prime is 1201845049. The next prime is 1201845067. The reversal of 1201845051 is 1505481021.

1201845051 is a `hidden beast` number, since 1 + 201 + 8 + 450 + 5 + 1 = 666.

It is not a de Polignac number, because 1201845051 - 2¹ = 1201845049 is a prime.

It is a super-2 number, since 2×1201845051² = 2888863053226385202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201845011) 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 11 ways as a sum of consecutive naturals, for example, 6069826 + ... + 6070023.

It is an arithmetic number, because the mean of its divisors is an integer number (157818050).

Almost surely, 2^1201845051 is an apocalyptic number.

1201845051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201845051 is a deficient number, since it is larger than the sum of its proper divisors (691971549).

1201845051 is a wasteful number, since it uses less digits than its factorization.

1201845051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12139866 (or 12139863 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 1201845051 is about 34667.6369399473. The cubic root of 1201845051 is about 1063.2029178625.

The spelling of 1201845051 in words is "one billion, two hundred one million, eight hundred forty-five thousand, fifty-one".