1321775254 has 4 divisors (see below), whose sum is σ = 1982662884. Its totient is φ = 660887626.

The previous prime is 1321775251. The next prime is 1321775269. The reversal of 1321775254 is 4525771231.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321775251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330443812 + ... + 330443815.

It is an arithmetic number, because the mean of its divisors is an integer number (495665721).

Almost surely, 2^1321775254 is an apocalyptic number.

1321775254 is a deficient number, since it is larger than the sum of its proper divisors (660887630).

1321775254 is an equidigital number, since it uses as much as digits as its factorization.

1321775254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660887629.

The product of its digits is 58800, while the sum is 37.

The square root of 1321775254 is about 36356.2271694960. The cubic root of 1321775254 is about 1097.4528540724.

The spelling of 1321775254 in words is "one billion, three hundred twenty-one million, seven hundred seventy-five thousand, two hundred fifty-four".