1240381489 has 8 divisors (see below), whose sum is σ = 1318024008. Its totient is φ = 1163258880.

The previous prime is 1240381463. The next prime is 1240381507. The reversal of 1240381489 is 9841830421.

It can be written as a sum of positive squares in 4 ways, for example, as 850713889 + 389667600 = 29167^2 + 19740^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1240381489 - 2²⁵ = 1206827057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240382489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125052 + ... + 134605.

It is an arithmetic number, because the mean of its divisors is an integer number (164753001).

Almost surely, 2^1240381489 is an apocalyptic number.

It is an amenable number.

1240381489 is a deficient number, since it is larger than the sum of its proper divisors (77642519).

1240381489 is a wasteful number, since it uses less digits than its factorization.

1240381489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259955.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1240381489 is about 35219.0500865654. The cubic root of 1240381489 is about 1074.4472338255.

The spelling of 1240381489 in words is "one billion, two hundred forty million, three hundred eighty-one thousand, four hundred eighty-nine".