1200137449 has 21 divisors (see below), whose sum is σ = 1414158871. Its totient is φ = 1018504200.

The previous prime is 1200137443. The next prime is 1200137461. The reversal of 1200137449 is 9447310021.

The square root of 1200137449 is 34643.

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

It can be written as a sum of positive squares in only one way, i.e., 1153077849 + 47059600 = 33957^2 + 6860^2 .

It is not a de Polignac number, because 1200137449 - 2⁹ = 1200136937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200137449.

It is not an unprimeable number, because it can be changed into a prime (1200137443) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 11882499 + ... + 11882599.

Almost surely, 2^1200137449 is an apocalyptic number.

1200137449 is the 34643-rd square number.

1200137449 is the 17322-nd centered octagonal number.

It is an amenable number.

1200137449 is a deficient number, since it is larger than the sum of its proper divisors (214021422).

1200137449 is an frugal number, since it uses more digits than its factorization.

1200137449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The cubic root of 1200137449 is about 1062.6991402330.

The spelling of 1200137449 in words is "one billion, two hundred million, one hundred thirty-seven thousand, four hundred forty-nine".