61421505 has 8 divisors (see below), whose sum is σ = 98274432. Its totient is φ = 32758128.

The previous prime is 61421453. The next prime is 61421573. The reversal of 61421505 is 50512416.

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

It is not a de Polignac number, because 61421505 - 2⁶ = 61421441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047369 + ... + 2047398.

It is an arithmetic number, because the mean of its divisors is an integer number (12284304).

Almost surely, 2^61421505 is an apocalyptic number.

It is an amenable number.

61421505 is a deficient number, since it is larger than the sum of its proper divisors (36852927).

61421505 is a wasteful number, since it uses less digits than its factorization.

61421505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094775.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 61421505 is about 7837.1873143367. The cubic root of 61421505 is about 394.5543336551.

The spelling of 61421505 in words is "sixty-one million, four hundred twenty-one thousand, five hundred five".