61020765 has 24 divisors (see below), whose sum is σ = 113906520. Its totient is φ = 30040704.

The previous prime is 61020731. The next prime is 61020779. The reversal of 61020765 is 56702016.

It can be written as a sum of positive squares in 4 ways, for example, as 11148921 + 49871844 = 3339^2 + 7062^2 .

It is not a de Polignac number, because 61020765 - 2¹³ = 61012573 is a prime.

It is a super-2 number, since 2×61020765² = 7447067522370450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51570 + ... + 52739.

It is an arithmetic number, because the mean of its divisors is an integer number (4746105).

Almost surely, 2^61020765 is an apocalyptic number.

61020765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61020765 is a deficient number, since it is larger than the sum of its proper divisors (52885755).

61020765 is a wasteful number, since it uses less digits than its factorization.

61020765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104333 (or 104330 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 61020765 is about 7811.5789057015. The cubic root of 61020765 is about 393.6943806548.

The spelling of 61020765 in words is "sixty-one million, twenty thousand, seven hundred sixty-five".