1242971572 has 12 divisors (see below), whose sum is σ = 2176570116. Its totient is φ = 621094400.

The previous prime is 1242971557. The next prime is 1242971579. The reversal of 1242971572 is 2751792421.

It can be written as a sum of positive squares in 2 ways, for example, as 1016589456 + 226382116 = 31884^2 + 15046^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242971579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90643 + ... + 103450.

It is an arithmetic number, because the mean of its divisors is an integer number (181380843).

Almost surely, 2^1242971572 is an apocalyptic number.

It is an amenable number.

1242971572 is a deficient number, since it is larger than the sum of its proper divisors (933598544).

1242971572 is a wasteful number, since it uses less digits than its factorization.

1242971572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195698 (or 195696 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 1242971572 is about 35255.8019622303. The cubic root of 1242971572 is about 1075.1945772182.

The spelling of 1242971572 in words is "one billion, two hundred forty-two million, nine hundred seventy-one thousand, five hundred seventy-two".