1234749321 has 81 divisors (see below), whose sum is σ = 2091000639. Its totient is φ = 701655552.

The previous prime is 1234749293. The next prime is 1234749331. The reversal of 1234749321 is 1239474321.

It is a happy number.

The square root of 1234749321 is 35139.

It is a perfect power (a square), and thus also a powerful number.

1234749321 is a `hidden beast` number, since 123 + 47 + 493 + 2 + 1 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 454329225 + 780420096 = 21315^2 + 27936^2 .

It is not a de Polignac number, because 1234749321 - 2¹⁷ = 1234618249 is a prime.

It is a super-2 number, since 2×1234749321² = 3049211771419922082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1234749331) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 23297131 + ... + 23297183.

Almost surely, 2^1234749321 is an apocalyptic number.

1234749321 is the 35139-th square number.

1234749321 is the 17570-th centered octagonal number.

It is an amenable number.

1234749321 is a deficient number, since it is larger than the sum of its proper divisors (856251318).

1234749321 is a wasteful number, since it uses less digits than its factorization.

1234749321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 86 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The cubic root of 1234749321 is about 1072.8185279787.

Multiplying 1234749321 by its sum of digits (36), we get a square (44450975556 = 210834²).

The spelling of 1234749321 in words is "one billion, two hundred thirty-four million, seven hundred forty-nine thousand, three hundred twenty-one".