1490871505 has 4 divisors (see below), whose sum is σ = 1789045812. Its totient is φ = 1192697200.

The previous prime is 1490871467. The next prime is 1490871509. The reversal of 1490871505 is 5051780941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 793436224 + 697435281 = 28168^2 + 26409^2 .

It is not a de Polignac number, because 1490871505 - 2¹³ = 1490863313 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1490871509) 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, 149087146 + ... + 149087155.

It is an arithmetic number, because the mean of its divisors is an integer number (447261453).

Almost surely, 2^1490871505 is an apocalyptic number.

It is an amenable number.

1490871505 is a deficient number, since it is larger than the sum of its proper divisors (298174307).

1490871505 is an equidigital number, since it uses as much as digits as its factorization.

1490871505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298174306.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 1490871505 is about 38611.8052543519. The cubic root of 1490871505 is about 1142.3874008611.

The spelling of 1490871505 in words is "one billion, four hundred ninety million, eight hundred seventy-one thousand, five hundred five".