1490498521 has 2 divisors, whose sum is σ = 1490498522. Its totient is φ = 1490498520.

The previous prime is 1490498473. The next prime is 1490498531. The reversal of 1490498521 is 1258940941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1443164121 + 47334400 = 37989^2 + 6880^2 .

It is an emirp because it is prime and its reverse (1258940941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1490498521 - 2¹¹ = 1490496473 is a prime.

It is a super-2 number, since 2×1490498521² = 4443171682206374882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1490498531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745249260 + 745249261.

It is an arithmetic number, because the mean of its divisors is an integer number (745249261).

Almost surely, 2^1490498521 is an apocalyptic number.

It is an amenable number.

1490498521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490498521 is an equidigital number, since it uses as much as digits as its factorization.

1490498521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1490498521 is about 38606.9750304268. The cubic root of 1490498521 is about 1142.2921259925.

The spelling of 1490498521 in words is "one billion, four hundred ninety million, four hundred ninety-eight thousand, five hundred twenty-one".