1493621 has 2 divisors, whose sum is σ = 1493622. Its totient is φ = 1493620.

The previous prime is 1493617. The next prime is 1493623. The reversal of 1493621 is 1263941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1406596 + 87025 = 1186^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493621 - 2² = 1493617 is a prime.

Together with 1493623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746810 + 746811.

It is an arithmetic number, because the mean of its divisors is an integer number (746811).

2^1493621 is an apocalyptic number.

It is an amenable number.

1493621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493621 is an equidigital number, since it uses as much as digits as its factorization.

1493621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1493621 is about 1222.1378809283. The cubic root of 1493621 is about 114.3089240807.

The spelling of 1493621 in words is "one million, four hundred ninety-three thousand, six hundred twenty-one".