1209252938 has 8 divisors (see below), whose sum is σ = 1817233860. Its totient is φ = 603508320.

The previous prime is 1209252931. The next prime is 1209252949. The reversal of 1209252938 is 8392529021.

It can be written as a sum of positive squares in 2 ways, for example, as 1208466169 + 786769 = 34763^2 + 887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1209252895 and 1209252904.

It is not an unprimeable number, because it can be changed into a prime (1209252931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557723 + ... + 559886.

Almost surely, 2^1209252938 is an apocalyptic number.

1209252938 is a deficient number, since it is larger than the sum of its proper divisors (607980922).

1209252938 is a wasteful number, since it uses less digits than its factorization.

1209252938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118152.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1209252938 is about 34774.3143426294. The cubic root of 1209252938 is about 1065.3828883293.

The spelling of 1209252938 in words is "one billion, two hundred nine million, two hundred fifty-two thousand, nine hundred thirty-eight".