1201663172 has 6 divisors (see below), whose sum is σ = 2102910558. Its totient is φ = 600831584.

The previous prime is 1201663159. The next prime is 1201663181. The reversal of 1201663172 is 2713661021.

It can be written as a sum of positive squares in only one way, i.e., 1193287936 + 8375236 = 34544^2 + 2894^2 .

It is a super-2 number, since 2×1201663172² = 2887988757882203168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150207893 + ... + 150207900.

It is an arithmetic number, because the mean of its divisors is an integer number (350485093).

Almost surely, 2^1201663172 is an apocalyptic number.

It is an amenable number.

1201663172 is a deficient number, since it is larger than the sum of its proper divisors (901247386).

1201663172 is a wasteful number, since it uses less digits than its factorization.

1201663172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300415797 (or 300415795 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1201663172 is about 34665.0136593079. The cubic root of 1201663172 is about 1063.1492825405.

The spelling of 1201663172 in words is "one billion, two hundred one million, six hundred sixty-three thousand, one hundred seventy-two".