61451065 has 16 divisors (see below), whose sum is σ = 79723728. Its totient is φ = 45202176.

The previous prime is 61451057. The next prime is 61451113. The reversal of 61451065 is 56015416.

It can be written as a sum of positive squares in 8 ways, for example, as 1806336 + 59644729 = 1344^2 + 7723^2 .

It is a cyclic number.

It is not a de Polignac number, because 61451065 - 2³ = 61451057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16299 + ... + 19711.

It is an arithmetic number, because the mean of its divisors is an integer number (4982733).

Almost surely, 2^61451065 is an apocalyptic number.

61451065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61451065 is a deficient number, since it is larger than the sum of its proper divisors (18272663).

61451065 is a wasteful number, since it uses less digits than its factorization.

61451065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 61451065 is about 7839.0729681513. The cubic root of 61451065 is about 394.6176185236.

The spelling of 61451065 in words is "sixty-one million, four hundred fifty-one thousand, sixty-five".