145247774 has 12 divisors (see below), whose sum is σ = 249073512. Its totient is φ = 62229720.

The previous prime is 145247701. The next prime is 145247777. The reversal of 145247774 is 477742541.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145247777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43484 + ... + 46704.

It is an arithmetic number, because the mean of its divisors is an integer number (20756126).

Almost surely, 2^145247774 is an apocalyptic number.

145247774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

145247774 is a deficient number, since it is larger than the sum of its proper divisors (103825738).

145247774 is an frugal number, since it uses more digits than its factorization.

145247774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451 (or 3230 counting only the distinct ones).

The product of its digits is 219520, while the sum is 41.

The square root of 145247774 is about 12051.8784427989. The cubic root of 145247774 is about 525.6578589139.

The spelling of 145247774 in words is "one hundred forty-five million, two hundred forty-seven thousand, seven hundred seventy-four".