61488921 has 16 divisors (see below), whose sum is σ = 92939840. Its totient is φ = 35847360.

The previous prime is 61488919. The next prime is 61488923. The reversal of 61488921 is 12988416.

It is an interprime number because it is at equal distance from previous prime (61488919) and next prime (61488923).

It is not a de Polignac number, because 61488921 - 2¹ = 61488919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61488921.

It is not an unprimeable number, because it can be changed into a prime (61488923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40750 + ... + 42231.

It is an arithmetic number, because the mean of its divisors is an integer number (5808740).

Almost surely, 2^61488921 is an apocalyptic number.

It is an amenable number.

61488921 is a deficient number, since it is larger than the sum of its proper divisors (31450919).

61488921 is a wasteful number, since it uses less digits than its factorization.

61488921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83016.

The product of its digits is 27648, while the sum is 39.

The square root of 61488921 is about 7841.4871676232. The cubic root of 61488921 is about 394.6986346299.

The spelling of 61488921 in words is "sixty-one million, four hundred eighty-eight thousand, nine hundred twenty-one".