35140721 has 16 divisors (see below), whose sum is σ = 45325440. Its totient is φ = 26436480.

The previous prime is 35140691. The next prime is 35140739. The reversal of 35140721 is 12704153.

It is not a de Polignac number, because 35140721 - 2⁶ = 35140657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (35142721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5636 + ... + 10101.

It is an arithmetic number, because the mean of its divisors is an integer number (2832840).

Almost surely, 2^35140721 is an apocalyptic number.

It is an amenable number.

35140721 is a deficient number, since it is larger than the sum of its proper divisors (10184719).

35140721 is a wasteful number, since it uses less digits than its factorization.

35140721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15784.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 35140721 is about 5927.9609479146. The cubic root of 35140721 is about 327.5444331066.

Adding to 35140721 its reverse (12704153), we get a palindrome (47844874).

The spelling of 35140721 in words is "thirty-five million, one hundred forty thousand, seven hundred twenty-one".