1145213451 has 32 divisors (see below), whose sum is σ = 1783963200. Its totient is φ = 725034240.

The previous prime is 1145213437. The next prime is 1145213479. The reversal of 1145213451 is 1543125411.

It is not a de Polignac number, because 1145213451 - 2¹⁰ = 1145212427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1145223451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35775 + ... + 59751.

It is an arithmetic number, because the mean of its divisors is an integer number (55748850).

Almost surely, 2^1145213451 is an apocalyptic number.

1145213451 is a deficient number, since it is larger than the sum of its proper divisors (638749749).

1145213451 is a wasteful number, since it uses less digits than its factorization.

1145213451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24076 (or 24070 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1145213451 is about 33841.0025117460. The cubic root of 1145213451 is about 1046.2339615481.

Adding to 1145213451 its reverse (1543125411), we get a palindrome (2688338862).

The spelling of 1145213451 in words is "one billion, one hundred forty-five million, two hundred thirteen thousand, four hundred fifty-one".