1972421049 has 16 divisors (see below), whose sum is σ = 2702697408. Its totient is φ = 1278591552.

The previous prime is 1972421029. The next prime is 1972421081. The reversal of 1972421049 is 9401242791.

It is not a de Polignac number, because 1972421049 - 2²¹ = 1970323897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1972420998 and 1972421016.

It is not an unprimeable number, because it can be changed into a prime (1972421029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203614 + ... + 213080.

It is an arithmetic number, because the mean of its divisors is an integer number (168918588).

Almost surely, 2^1972421049 is an apocalyptic number.

It is an amenable number.

1972421049 is a deficient number, since it is larger than the sum of its proper divisors (730276359).

1972421049 is a wasteful number, since it uses less digits than its factorization.

1972421049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11384.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1972421049 is about 44411.9471426327. The cubic root of 1972421049 is about 1254.1030079782.

The spelling of 1972421049 in words is "one billion, nine hundred seventy-two million, four hundred twenty-one thousand, forty-nine".