1061521490 has 16 divisors (see below), whose sum is σ = 1962380952. Its totient is φ = 413132544.

The previous prime is 1061521459. The next prime is 1061521493. The reversal of 1061521490 is 941251601.

It can be written as a sum of positive squares in 4 ways, for example, as 785064361 + 276457129 = 28019^2 + 16627^2 .

It is a super-2 number, since 2×1061521490² = 2253655747463640200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1061521493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434119 + ... + 1434858.

Almost surely, 2^1061521490 is an apocalyptic number.

1061521490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1061521490 is a deficient number, since it is larger than the sum of its proper divisors (900859462).

1061521490 is a wasteful number, since it uses less digits than its factorization.

1061521490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869021.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1061521490 is about 32580.9989104079. The cubic root of 1061521490 is about 1020.1004290452.

The spelling of 1061521490 in words is "one billion, sixty-one million, five hundred twenty-one thousand, four hundred ninety".