1072121556 has 24 divisors (see below), whose sum is σ = 2729037024. Its totient is φ = 324885280.

The previous prime is 1072121539. The next prime is 1072121573. The reversal of 1072121556 is 6551212701.

It is an interprime number because it is at equal distance from previous prime (1072121539) and next prime (1072121573).

It is a super-2 number, since 2×1072121556² = 2298889261679722272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4060935 + ... + 4061198.

It is an arithmetic number, because the mean of its divisors is an integer number (113709876).

Almost surely, 2^1072121556 is an apocalyptic number.

It is an amenable number.

1072121556 is an abundant number, since it is smaller than the sum of its proper divisors (1656915468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1072121556 is a wasteful number, since it uses less digits than its factorization.

1072121556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8122151 (or 8122149 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1072121556 is about 32743.2673384927. The cubic root of 1072121556 is about 1023.4846713783.

The spelling of 1072121556 in words is "one billion, seventy-two million, one hundred twenty-one thousand, five hundred fifty-six".