1237985272 has 8 divisors (see below), whose sum is σ = 2321222400. Its totient is φ = 618992632.

The previous prime is 1237985251. The next prime is 1237985303. The reversal of 1237985272 is 2725897321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77374072 + ... + 77374087.

It is an arithmetic number, because the mean of its divisors is an integer number (290152800).

Almost surely, 2^1237985272 is an apocalyptic number.

It is an amenable number.

1237985272 is a deficient number, since it is larger than the sum of its proper divisors (1083237128).

1237985272 is a wasteful number, since it uses less digits than its factorization.

1237985272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154748165 (or 154748161 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The square root of 1237985272 is about 35185.0148784962. The cubic root of 1237985272 is about 1073.7549015494.

The spelling of 1237985272 in words is "one billion, two hundred thirty-seven million, nine hundred eighty-five thousand, two hundred seventy-two".