35042721 has 32 divisors (see below), whose sum is σ = 55216128. Its totient is φ = 19353600.

The previous prime is 35042713. The next prime is 35042753. The reversal of 35042721 is 12724053.

35042721 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 35042721 - 2³ = 35042713 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 35042691 and 35042700.

It is not an unprimeable number, because it can be changed into a prime (35042521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136225 + ... + 136481.

It is an arithmetic number, because the mean of its divisors is an integer number (1725504).

Almost surely, 2^35042721 is an apocalyptic number.

It is an amenable number.

35042721 is a deficient number, since it is larger than the sum of its proper divisors (20173407).

35042721 is a wasteful number, since it uses less digits than its factorization.

35042721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 35042721 is about 5919.6892654936. The cubic root of 35042721 is about 327.2396656908.

Adding to 35042721 its reverse (12724053), we get a palindrome (47766774).

It can be divided in two parts, 350 and 42721, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 35042721 in words is "thirty-five million, forty-two thousand, seven hundred twenty-one".