1207447021 has 12 divisors (see below), whose sum is σ = 1340347932. Its totient is φ = 1086800000.

The previous prime is 1207447001. The next prime is 1207447037.

1207447021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 1070205796 + 137241225 = 32714^2 + 11715^2 .

It is not a de Polignac number, because 1207447021 - 2¹⁹ = 1206922733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1207447001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37180 + ... + 61621.

It is an arithmetic number, because the mean of its divisors is an integer number (111695661).

Almost surely, 2^1207447021 is an apocalyptic number.

1207447021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1207447021 is a deficient number, since it is larger than the sum of its proper divisors (132900911).

1207447021 is a wasteful number, since it uses less digits than its factorization.

1207447021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98924 (or 98913 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 1207447021 is about 34748.3383919289. The cubic root of 1207447021 is about 1064.8522710150.

It can be divided in two parts, 120744 and 7021, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 1207447021 in words is "one billion, two hundred seven million, four hundred forty-seven thousand, twenty-one".