61420872 has 32 divisors (see below), whose sum is σ = 154123200. Its totient is φ = 20397504.

The previous prime is 61420871. The next prime is 61420873. The reversal of 61420872 is 27802416.

It is an interprime number because it is at equal distance from previous prime (61420871) and next prime (61420873).

It is not an unprimeable number, because it can be changed into a prime (61420871) 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, 2029 + ... + 11267.

It is an arithmetic number, because the mean of its divisors is an integer number (4816350).

Almost surely, 2^61420872 is an apocalyptic number.

It is an amenable number.

61420872 is an abundant number, since it is smaller than the sum of its proper divisors (92702328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61420872 is a wasteful number, since it uses less digits than its factorization.

61420872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9525 (or 9521 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 61420872 is about 7837.1469298463. The cubic root of 61420872 is about 394.5529782463.

The spelling of 61420872 in words is "sixty-one million, four hundred twenty thousand, eight hundred seventy-two".