1445261730 has 32 divisors (see below), whose sum is σ = 3783958848. Its totient is φ = 350366400.

The previous prime is 1445261723. The next prime is 1445261743. The reversal of 1445261730 is 371625441.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1445261691 and 1445261700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189461 + ... + 2190120.

It is an arithmetic number, because the mean of its divisors is an integer number (118248714).

Almost surely, 2^1445261730 is an apocalyptic number.

1445261730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1445261730 is an abundant number, since it is smaller than the sum of its proper divisors (2338697118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445261730 is a wasteful number, since it uses less digits than its factorization.

1445261730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379602.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1445261730 is about 38016.5980855731. The cubic root of 1445261730 is about 1130.6169732272.

It can be divided in two parts, 1445 and 261730, that added together give a triangular number (263175 = T₇₂₅).

The spelling of 1445261730 in words is "one billion, four hundred forty-five million, two hundred sixty-one thousand, seven hundred thirty".