1042172788 has 6 divisors (see below), whose sum is σ = 1823802386. Its totient is φ = 521086392.

The previous prime is 1042172767. The next prime is 1042172801. The reversal of 1042172788 is 8872712401.

It can be written as a sum of positive squares in only one way, i.e., 827022564 + 215150224 = 28758^2 + 14668^2 .

It is a super-2 number, since 2×1042172788² = 2172248240095385888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1042172788.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130271595 + ... + 130271602.

Almost surely, 2^1042172788 is an apocalyptic number.

It is an amenable number.

1042172788 is a deficient number, since it is larger than the sum of its proper divisors (781629598).

1042172788 is a wasteful number, since it uses less digits than its factorization.

1042172788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260543201 (or 260543199 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 1042172788 is about 32282.7010641923. The cubic root of 1042172788 is about 1013.8644837292.

The spelling of 1042172788 in words is "one billion, forty-two million, one hundred seventy-two thousand, seven hundred eighty-eight".