1216425526 has 8 divisors (see below), whose sum is σ = 1826428464. Its totient is φ = 607616040.

The previous prime is 1216425473. The next prime is 1216425527. The reversal of 1216425526 is 6255246121.

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 = 1216425491 and 1216425500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216425527) 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, 295810 + ... + 299893.

It is an arithmetic number, because the mean of its divisors is an integer number (228303558).

Almost surely, 2^1216425526 is an apocalyptic number.

1216425526 is a deficient number, since it is larger than the sum of its proper divisors (610002938).

1216425526 is a wasteful number, since it uses less digits than its factorization.

1216425526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596726.

The product of its digits is 28800, while the sum is 34.

The square root of 1216425526 is about 34877.2924121125. The cubic root of 1216425526 is about 1067.4851487275.

The spelling of 1216425526 in words is "one billion, two hundred sixteen million, four hundred twenty-five thousand, five hundred twenty-six".