61020415 has 4 divisors (see below), whose sum is σ = 73224504. Its totient is φ = 48816328.

The previous prime is 61020413. The next prime is 61020433. The reversal of 61020415 is 51402016.

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

It is a cyclic number.

It is not a de Polignac number, because 61020415 - 2¹ = 61020413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61020392 and 61020401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61020413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6102037 + ... + 6102046.

It is an arithmetic number, because the mean of its divisors is an integer number (18306126).

Almost surely, 2^61020415 is an apocalyptic number.

61020415 is a deficient number, since it is larger than the sum of its proper divisors (12204089).

61020415 is a wasteful number, since it uses less digits than its factorization.

61020415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12204088.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 61020415 is about 7811.5565030281. The cubic root of 61020415 is about 393.6936279422.

It can be divided in two parts, 610 and 20415, that added together give a square (21025 = 145²).

The spelling of 61020415 in words is "sixty-one million, twenty thousand, four hundred fifteen".