145047747 has 16 divisors (see below), whose sum is σ = 209609120. Its totient is φ = 88687872.

The previous prime is 145047743. The next prime is 145047769. The reversal of 145047747 is 747740541.

It is not a de Polignac number, because 145047747 - 2² = 145047743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145047743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5722 + ... + 17967.

It is an arithmetic number, because the mean of its divisors is an integer number (13100570).

Almost surely, 2^145047747 is an apocalyptic number.

145047747 is a deficient number, since it is larger than the sum of its proper divisors (64561373).

145047747 is a wasteful number, since it uses less digits than its factorization.

145047747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23862.

The product of its (nonzero) digits is 109760, while the sum is 39.

The square root of 145047747 is about 12043.5770018712. The cubic root of 145047747 is about 525.4164459922.

145047747 divided by its sum of digits (39) gives a palindrome (3719173).

The spelling of 145047747 in words is "one hundred forty-five million, forty-seven thousand, seven hundred forty-seven".