1220426534 has 8 divisors (see below), whose sum is σ = 1869589728. Its totient is φ = 597229960.

The previous prime is 1220426527. The next prime is 1220426539. The reversal of 1220426534 is 4356240221.

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 = 1220426497 and 1220426506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220426539) 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, 6491537 + ... + 6491724.

It is an arithmetic number, because the mean of its divisors is an integer number (233698716).

Almost surely, 2^1220426534 is an apocalyptic number.

1220426534 is a deficient number, since it is larger than the sum of its proper divisors (649163194).

1220426534 is a wasteful number, since it uses less digits than its factorization.

1220426534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12983310.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1220426534 is about 34934.6036760116. The cubic root of 1220426534 is about 1068.6542413936.

Adding to 1220426534 its reverse (4356240221), we get a palindrome (5576666755).

The spelling of 1220426534 in words is "one billion, two hundred twenty million, four hundred twenty-six thousand, five hundred thirty-four".