1201570781 has 8 divisors (see below), whose sum is σ = 1206080928. Its totient is φ = 1197070000.

The previous prime is 1201570771. The next prime is 1201570787. The reversal of 1201570781 is 1870751021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201570781 - 2³⁰ = 127828957 is a prime.

It is a super-2 number, since 2×1201570781² = 2887544683505899922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201570787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342446 + ... + 345936.

It is an arithmetic number, because the mean of its divisors is an integer number (150760116).

Almost surely, 2^1201570781 is an apocalyptic number.

It is an amenable number.

1201570781 is a deficient number, since it is larger than the sum of its proper divisors (4510147).

1201570781 is an equidigital number, since it uses as much as digits as its factorization.

1201570781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 1201570781 is about 34663.6810076483. The cubic root of 1201570781 is about 1063.1220347656.

The spelling of 1201570781 in words is "one billion, two hundred one million, five hundred seventy thousand, seven hundred eighty-one".