1145142257 has 8 divisors (see below), whose sum is σ = 1309136832. Its totient is φ = 981248400.

The previous prime is 1145142233. The next prime is 1145142277. The reversal of 1145142257 is 7522415411.

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 1145142257 - 2¹⁶ = 1145076721 is a prime.

It is a super-2 number, since 2×1145142257² = 2622701577534108098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145142277) 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, 1007 + ... + 47867.

It is an arithmetic number, because the mean of its divisors is an integer number (163642104).

Almost surely, 2^1145142257 is an apocalyptic number.

It is an amenable number.

1145142257 is a deficient number, since it is larger than the sum of its proper divisors (163994575).

1145142257 is an equidigital number, since it uses as much as digits as its factorization.

1145142257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50359.

The product of its digits is 11200, while the sum is 32.

The square root of 1145142257 is about 33839.9506057559. The cubic root of 1145142257 is about 1046.2122808375.

Adding to 1145142257 its reverse (7522415411), we get a palindrome (8667557668).

The spelling of 1145142257 in words is "one billion, one hundred forty-five million, one hundred forty-two thousand, two hundred fifty-seven".