61235409 has 8 divisors (see below), whose sum is σ = 81864160. Its totient is φ = 40715136.

The previous prime is 61235401. The next prime is 61235413. The reversal of 61235409 is 90453216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61235409 - 2³ = 61235401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61235401) 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, 25792 + ... + 28065.

It is an arithmetic number, because the mean of its divisors is an integer number (10233020).

Almost surely, 2^61235409 is an apocalyptic number.

It is an amenable number.

61235409 is a deficient number, since it is larger than the sum of its proper divisors (20628751).

61235409 is a wasteful number, since it uses less digits than its factorization.

61235409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54239.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 61235409 is about 7825.3056809303. The cubic root of 61235409 is about 394.1554545593.

The spelling of 61235409 in words is "sixty-one million, two hundred thirty-five thousand, four hundred nine".