1629401 has 4 divisors (see below), whose sum is σ = 1636404. Its totient is φ = 1622400.

The previous prime is 1629377. The next prime is 1629409. The reversal of 1629401 is 1049261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1263376 + 366025 = 1124^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1629401 - 2⁶ = 1629337 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1629409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3140 + ... + 3621.

It is an arithmetic number, because the mean of its divisors is an integer number (409101).

2^1629401 is an apocalyptic number.

It is an amenable number.

1629401 is a deficient number, since it is larger than the sum of its proper divisors (7003).

1629401 is an equidigital number, since it uses as much as digits as its factorization.

1629401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1629401 is about 1276.4799254199. The cubic root of 1629401 is about 117.6727743443.

The spelling of 1629401 in words is "one million, six hundred twenty-nine thousand, four hundred one".