1201275377 has 4 divisors (see below), whose sum is σ = 1201355760. Its totient is φ = 1201194996.

The previous prime is 1201275373. The next prime is 1201275407. The reversal of 1201275377 is 7735721021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1201275377 - 2² = 1201275373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201275373) 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, 10427 + ... + 50112.

It is an arithmetic number, because the mean of its divisors is an integer number (300338940).

Almost surely, 2^1201275377 is an apocalyptic number.

It is an amenable number.

1201275377 is a deficient number, since it is larger than the sum of its proper divisors (80383).

1201275377 is an equidigital number, since it uses as much as digits as its factorization.

1201275377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80382.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 1201275377 is about 34659.4197441331. The cubic root of 1201275377 is about 1063.0349054161.

Adding to 1201275377 its reverse (7735721021), we get a palindrome (8936996398).

The spelling of 1201275377 in words is "one billion, two hundred one million, two hundred seventy-five thousand, three hundred seventy-seven".