1145210631 has 4 divisors (see below), whose sum is σ = 1526947512. Its totient is φ = 763473752.

The previous prime is 1145210543. The next prime is 1145210639. The reversal of 1145210631 is 1360125411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1360125411 = 3 ⋅453375137.

It is a cyclic number.

It is not a de Polignac number, because 1145210631 - 2¹³ = 1145202439 is a prime.

It is a super-2 number, since 2×1145210631² = 2623014778710836322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145210639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190868436 + ... + 190868441.

It is an arithmetic number, because the mean of its divisors is an integer number (381736878).

Almost surely, 2^1145210631 is an apocalyptic number.

1145210631 is a deficient number, since it is larger than the sum of its proper divisors (381736881).

1145210631 is an equidigital number, since it uses as much as digits as its factorization.

1145210631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381736880.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1145210631 is about 33840.9608462880. The cubic root of 1145210631 is about 1046.2331027905.

The spelling of 1145210631 in words is "one billion, one hundred forty-five million, two hundred ten thousand, six hundred thirty-one".