61387225 has 9 divisors (see below), whose sum is σ = 76168767. Its totient is φ = 49078440.

The previous prime is 61387213. The next prime is 61387241. The reversal of 61387225 is 52278316.

It is a happy number.

The square root of 61387225 is 7835.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 22099401 + 39287824 = 4701^2 + 6268^2 .

It is not a de Polignac number, because 61387225 - 2¹³ = 61379033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38392 + ... + 39958.

Almost surely, 2^61387225 is an apocalyptic number.

61387225 is the 7835-th square number.

61387225 is the 3918-th centered octagonal number.

It is an amenable number.

61387225 is a deficient number, since it is larger than the sum of its proper divisors (14781542).

61387225 is an frugal number, since it uses more digits than its factorization.

61387225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144 (or 1572 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The cubic root of 61387225 is about 394.4809183285.

The spelling of 61387225 in words is "sixty-one million, three hundred eighty-seven thousand, two hundred twenty-five".