61215026 has 8 divisors (see below), whose sum is σ = 93080604. Its totient is φ = 30188160.

The previous prime is 61215023. The next prime is 61215031. The reversal of 61215026 is 62051216.

It can be written as a sum of positive squares in 2 ways, for example, as 60824401 + 390625 = 7799^2 + 625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 61214992 and 61215010.

It is not an unprimeable number, because it can be changed into a prime (61215023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209495 + ... + 209786.

Almost surely, 2^61215026 is an apocalyptic number.

61215026 is a deficient number, since it is larger than the sum of its proper divisors (31865578).

61215026 is a wasteful number, since it uses less digits than its factorization.

61215026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419356.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61215026 is about 7824.0031952959. The cubic root of 61215026 is about 394.1117164545. Note that the first 3 decimals are identical.

The spelling of 61215026 in words is "sixty-one million, two hundred fifteen thousand, twenty-six".