1220140654 has 4 divisors (see below), whose sum is σ = 1830210984. Its totient is φ = 610070326.

The previous prime is 1220140637. The next prime is 1220140667. The reversal of 1220140654 is 4560410221.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305035162 + ... + 305035165.

It is an arithmetic number, because the mean of its divisors is an integer number (457552746).

Almost surely, 2^1220140654 is an apocalyptic number.

1220140654 is a deficient number, since it is larger than the sum of its proper divisors (610070330).

1220140654 is an equidigital number, since it uses as much as digits as its factorization.

1220140654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610070329.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1220140654 is about 34930.5117912692. The cubic root of 1220140654 is about 1068.5707922268.

Adding to 1220140654 its reverse (4560410221), we get a palindrome (5780550875).

The spelling of 1220140654 in words is "one billion, two hundred twenty million, one hundred forty thousand, six hundred fifty-four".