1490533481 has 4 divisors (see below), whose sum is σ = 1490612292. Its totient is φ = 1490454672.

The previous prime is 1490533453. The next prime is 1490533483. The reversal of 1490533481 is 1843350941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1843350941 = 24121 ⋅76421.

It can be written as a sum of positive squares in 2 ways, for example, as 473497600 + 1017035881 = 21760^2 + 31891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490533481 - 2⁶ = 1490533417 is a prime.

It is a super-2 number, since 2×1490533481² = 4443380115963954722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1490533483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7871 + ... + 55163.

It is an arithmetic number, because the mean of its divisors is an integer number (372653073).

Almost surely, 2^1490533481 is an apocalyptic number.

It is an amenable number.

1490533481 is a deficient number, since it is larger than the sum of its proper divisors (78811).

1490533481 is an equidigital number, since it uses as much as digits as its factorization.

1490533481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78810.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1490533481 is about 38607.4277956976. The cubic root of 1490533481 is about 1142.3010568345.

The spelling of 1490533481 in words is "one billion, four hundred ninety million, five hundred thirty-three thousand, four hundred eighty-one".