61428971 has 4 divisors (see below), whose sum is σ = 62470200. Its totient is φ = 60387744.

The previous prime is 61428967. The next prime is 61428977. The reversal of 61428971 is 17982416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61428971 - 2² = 61428967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61428977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520526 + ... + 520643.

It is an arithmetic number, because the mean of its divisors is an integer number (15617550).

Almost surely, 2^61428971 is an apocalyptic number.

61428971 is a deficient number, since it is larger than the sum of its proper divisors (1041229).

61428971 is a wasteful number, since it uses less digits than its factorization.

61428971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041228.

The product of its digits is 24192, while the sum is 38.

The square root of 61428971 is about 7837.6636187068. The cubic root of 61428971 is about 394.5703194965.

The spelling of 61428971 in words is "sixty-one million, four hundred twenty-eight thousand, nine hundred seventy-one".