1722472 has 8 divisors (see below), whose sum is σ = 3229650. Its totient is φ = 861232.

The previous prime is 1722463. The next prime is 1722481. The reversal of 1722472 is 2742271.

It is an interprime number because it is at equal distance from previous prime (1722463) and next prime (1722481).

It can be written as a sum of positive squares in only one way, i.e., 1602756 + 119716 = 1266^2 + 346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107647 + ... + 107662.

2^1722472 is an apocalyptic number.

It is an amenable number.

1722472 is a deficient number, since it is larger than the sum of its proper divisors (1507178).

1722472 is a wasteful number, since it uses less digits than its factorization.

1722472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215315 (or 215311 counting only the distinct ones).

The product of its digits is 1568, while the sum is 25.

The square root of 1722472 is about 1312.4298076469. The cubic root of 1722472 is about 119.8719003397.

The spelling of 1722472 in words is "one million, seven hundred twenty-two thousand, four hundred seventy-two".