61987225 has 6 divisors (see below), whose sum is σ = 76864190. Its totient is φ = 49589760.

The previous prime is 61987223. The next prime is 61987241. The reversal of 61987225 is 52278916.

It can be written as a sum of positive squares in 3 ways, for example, as 1971216 + 60016009 = 1404^2 + 7747^2 .

It is not a de Polignac number, because 61987225 - 2¹ = 61987223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61987223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1239720 + ... + 1239769.

Almost surely, 2^61987225 is an apocalyptic number.

It is an amenable number.

61987225 is a deficient number, since it is larger than the sum of its proper divisors (14876965).

61987225 is a wasteful number, since it uses less digits than its factorization.

61987225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479499 (or 2479494 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 61987225 is about 7873.1966189090. The cubic root of 61987225 is about 395.7619751947.

The spelling of 61987225 in words is "sixty-one million, nine hundred eighty-seven thousand, two hundred twenty-five".