1490654881 has 3 divisors (see below), whose sum is σ = 1490693491. Its totient is φ = 1490616272.

The previous prime is 1490654827. The next prime is 1490654903. The reversal of 1490654881 is 1884560941.

The square root of 1490654881 is 38609.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 422672481 + 1067982400 = 20559^2 + 32680^2 .

It is not a de Polignac number, because 1490654881 - 2²³ = 1482266273 is a prime.

It is a super-2 number, since 2×1490654881² = 4444103948498248322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1490654381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 19305 + ... + 57913.

Almost surely, 2^1490654881 is an apocalyptic number.

1490654881 is the 38609-th square number.

1490654881 is the 19305-th centered octagonal number.

It is an amenable number.

1490654881 is a deficient number, since it is larger than the sum of its proper divisors (38610).

1490654881 is an frugal number, since it uses more digits than its factorization.

1490654881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77218 (or 38609 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The cubic root of 1490654881 is about 1142.3320684567.

The spelling of 1490654881 in words is "one billion, four hundred ninety million, six hundred fifty-four thousand, eight hundred eighty-one".