1401211409 has 4 divisors (see below), whose sum is σ = 1508996916. Its totient is φ = 1293425904.

The previous prime is 1401211393. The next prime is 1401211429. The reversal of 1401211409 is 9041121041.

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 405619600 + 995591809 = 20140^2 + 31553^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401211409 - 2⁴ = 1401211393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401211429) 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, 53892734 + ... + 53892759.

It is an arithmetic number, because the mean of its divisors is an integer number (377249229).

Almost surely, 2^1401211409 is an apocalyptic number.

It is an amenable number.

1401211409 is a deficient number, since it is larger than the sum of its proper divisors (107785507).

1401211409 is a wasteful number, since it uses less digits than its factorization.

1401211409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107785506.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1401211409 is about 37432.7585010776. The cubic root of 1401211409 is about 1119.0115133105.

The spelling of 1401211409 in words is "one billion, four hundred one million, two hundred eleven thousand, four hundred nine".