61857441 has 24 divisors (see below), whose sum is σ = 94918824. Its totient is φ = 38684160.

The previous prime is 61857437. The next prime is 61857457. The reversal of 61857441 is 14475816.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21902400 + 39955041 = 4680^2 + 6321^2 .

It is not a de Polignac number, because 61857441 - 2² = 61857437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61857396 and 61857405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61857421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70095 + ... + 70971.

It is an arithmetic number, because the mean of its divisors is an integer number (3954951).

Almost surely, 2^61857441 is an apocalyptic number.

It is an amenable number.

61857441 is a deficient number, since it is larger than the sum of its proper divisors (33061383).

61857441 is a wasteful number, since it uses less digits than its factorization.

61857441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1358 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 61857441 is about 7864.9501587741. The cubic root of 61857441 is about 395.4855770554.

The spelling of 61857441 in words is "sixty-one million, eight hundred fifty-seven thousand, four hundred forty-one".