1201681487 has 4 divisors (see below), whose sum is σ = 1201858320. Its totient is φ = 1201504656.

The previous prime is 1201681463. The next prime is 1201681501. The reversal of 1201681487 is 7841861021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7841861021 = 7919 ⋅990259.

It is a cyclic number.

It is not a de Polignac number, because 1201681487 - 2⁸ = 1201681231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201681487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201681417) 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, 77798 + ... + 91955.

It is an arithmetic number, because the mean of its divisors is an integer number (300464580).

Almost surely, 2^1201681487 is an apocalyptic number.

1201681487 is a deficient number, since it is larger than the sum of its proper divisors (176833).

1201681487 is an equidigital number, since it uses as much as digits as its factorization.

1201681487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176832.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 1201681487 is about 34665.2778295516. The cubic root of 1201681487 is about 1063.1546837990.

The spelling of 1201681487 in words is "one billion, two hundred one million, six hundred eighty-one thousand, four hundred eighty-seven".