1254215345 has 8 divisors (see below), whose sum is σ = 1556957160. Its totient is φ = 968773120.

The previous prime is 1254215321. The next prime is 1254215419. The reversal of 1254215345 is 5435124521.

It can be written as a sum of positive squares in 4 ways, for example, as 102495376 + 1151719969 = 10124^2 + 33937^2 .

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

It is not a de Polignac number, because 1254215345 - 2⁸ = 1254215089 is a prime.

It is a super-2 number, since 2×1254215345² = 3146112263266938050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324736 + ... + 4325025.

It is an arithmetic number, because the mean of its divisors is an integer number (194619645).

Almost surely, 2^1254215345 is an apocalyptic number.

It is an amenable number.

1254215345 is a deficient number, since it is larger than the sum of its proper divisors (302741815).

1254215345 is an equidigital number, since it uses as much as digits as its factorization.

1254215345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8649795.

The product of its digits is 24000, while the sum is 32.

The square root of 1254215345 is about 35414.9028658840. The cubic root of 1254215345 is about 1078.4268778068.

Adding to 1254215345 its reverse (5435124521), we get a palindrome (6689339866).

The spelling of 1254215345 in words is "one billion, two hundred fifty-four million, two hundred fifteen thousand, three hundred forty-five".