61255445 has 4 divisors (see below), whose sum is σ = 73506540. Its totient is φ = 49004352.

The previous prime is 61255427. The next prime is 61255451. The reversal of 61255445 is 54455216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48539089 + 12716356 = 6967^2 + 3566^2 .

It is a cyclic number.

It is not a de Polignac number, because 61255445 - 2²⁰ = 60206869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6125540 + ... + 6125549.

It is an arithmetic number, because the mean of its divisors is an integer number (18376635).

Almost surely, 2^61255445 is an apocalyptic number.

It is an amenable number.

61255445 is a deficient number, since it is larger than the sum of its proper divisors (12251095).

61255445 is a wasteful number, since it uses less digits than its factorization.

61255445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12251094.

The product of its digits is 24000, while the sum is 32.

The square root of 61255445 is about 7826.5857818081. The cubic root of 61255445 is about 394.1984386086.

It can be divided in two parts, 6125 and 5445, that multiplied together give a square (33350625 = 5775²).

The spelling of 61255445 in words is "sixty-one million, two hundred fifty-five thousand, four hundred forty-five".