61429281 has 8 divisors (see below), whose sum is σ = 83028000. Its totient is φ = 40391712.

The previous prime is 61429267. The next prime is 61429283. The reversal of 61429281 is 18292416.

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

It is not a de Polignac number, because 61429281 - 2⁶ = 61429217 is a prime.

It is a super-2 number, since 2×61429281² = 7547113128353922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61429283) 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, 140031 + ... + 140468.

It is an arithmetic number, because the mean of its divisors is an integer number (10378500).

Almost surely, 2^61429281 is an apocalyptic number.

It is an amenable number.

61429281 is a deficient number, since it is larger than the sum of its proper divisors (21598719).

61429281 is a wasteful number, since it uses less digits than its factorization.

61429281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280575.

The product of its digits is 6912, while the sum is 33.

The square root of 61429281 is about 7837.6833949835. The cubic root of 61429281 is about 394.5709832256.

The spelling of 61429281 in words is "sixty-one million, four hundred twenty-nine thousand, two hundred eighty-one".