61220642 has 32 divisors (see below), whose sum is σ = 107706240. Its totient is φ = 25557120.

The previous prime is 61220617. The next prime is 61220651. The reversal of 61220642 is 24602216.

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, 112892 + ... + 113432.

It is an arithmetic number, because the mean of its divisors is an integer number (3365820).

Almost surely, 2^61220642 is an apocalyptic number.

61220642 is a deficient number, since it is larger than the sum of its proper divisors (46485598).

61220642 is a wasteful number, since it uses less digits than its factorization.

61220642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 61220642 is about 7824.3620826237. The cubic root of 61220642 is about 394.1237683087.

Adding to 61220642 its reverse (24602216), we get a palindrome (85822858).

The spelling of 61220642 in words is "sixty-one million, two hundred twenty thousand, six hundred forty-two".