1601521434 has 24 divisors (see below), whose sum is σ = 3493257300. Its totient is φ = 530256768.

The previous prime is 1601521421. The next prime is 1601521489. The reversal of 1601521434 is 4341251061.

It is a happy number.

1601521434 is a `hidden beast` number, since 1 + 601 + 5 + 21 + 4 + 34 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1592249409 + 9272025 = 39903^2 + 3045^2 .

It is a super-2 number, since 2×1601521434² = 5129741807122832712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1601521398 and 1601521407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295887 + ... + 301250.

Almost surely, 2^1601521434 is an apocalyptic number.

1601521434 is an abundant number, since it is smaller than the sum of its proper divisors (1891735866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601521434 is a wasteful number, since it uses less digits than its factorization.

1601521434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597294 (or 597291 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1601521434 is about 40019.0134061298. The cubic root of 1601521434 is about 1169.9777028405.

Adding to 1601521434 its reverse (4341251061), we get a palindrome (5942772495).

The spelling of 1601521434 in words is "one billion, six hundred one million, five hundred twenty-one thousand, four hundred thirty-four".