1490871506 has 4 divisors (see below), whose sum is σ = 2236307262. Its totient is φ = 745435752.

The previous prime is 1490871467. The next prime is 1490871509. The reversal of 1490871506 is 6051780941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6051780941 = 5081 ⋅1191061.

It can be written as a sum of positive squares in only one way, i.e., 1470032281 + 20839225 = 38341^2 + 4565^2 .

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 as a sum of consecutive naturals, namely, 372717875 + ... + 372717878.

Almost surely, 2^1490871506 is an apocalyptic number.

1490871506 is a deficient number, since it is larger than the sum of its proper divisors (745435756).

1490871506 is an equidigital number, since it uses as much as digits as its factorization.

1490871506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745435755.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1490871506 is about 38611.8052673013. The cubic root of 1490871506 is about 1142.3874011165.

The spelling of 1490871506 in words is "one billion, four hundred ninety million, eight hundred seventy-one thousand, five hundred six".