1321152457 has 8 divisors (see below), whose sum is σ = 1345082312. Its totient is φ = 1297296000.

The previous prime is 1321152439. The next prime is 1321152487. The reversal of 1321152457 is 7542511231.

It can be written as a sum of positive squares in 4 ways, for example, as 2808976 + 1318343481 = 1676^2 + 36309^2 .

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 1321152457 - 2¹⁵ = 1321119689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321152487) 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, 18643 + ... + 54679.

It is an arithmetic number, because the mean of its divisors is an integer number (168135289).

Almost surely, 2^1321152457 is an apocalyptic number.

It is an amenable number.

1321152457 is a deficient number, since it is larger than the sum of its proper divisors (23929855).

1321152457 is an equidigital number, since it uses as much as digits as its factorization.

1321152457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36699.

The product of its digits is 8400, while the sum is 31.

The square root of 1321152457 is about 36347.6609563807. The cubic root of 1321152457 is about 1097.2804602355.

Adding to 1321152457 its reverse (7542511231), we get a palindrome (8863663688).

The spelling of 1321152457 in words is "one billion, three hundred twenty-one million, one hundred fifty-two thousand, four hundred fifty-seven".