1401621407 has 4 divisors (see below), whose sum is σ = 1404951096. Its totient is φ = 1398291720.

The previous prime is 1401621349. The next prime is 1401621413. The reversal of 1401621407 is 7041261041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7041261041 = 439 ⋅16039319.

It is a cyclic number.

It is not a de Polignac number, because 1401621407 - 2²² = 1397427103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401621427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664213 + ... + 1665054.

It is an arithmetic number, because the mean of its divisors is an integer number (351237774).

Almost surely, 2^1401621407 is an apocalyptic number.

1401621407 is a deficient number, since it is larger than the sum of its proper divisors (3329689).

1401621407 is an equidigital number, since it uses as much as digits as its factorization.

1401621407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329688.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1401621407 is about 37438.2345604063. The cubic root of 1401621407 is about 1119.1206445329.

Adding to 1401621407 its reverse (7041261041), we get a palindrome (8442882448).

The spelling of 1401621407 in words is "one billion, four hundred one million, six hundred twenty-one thousand, four hundred seven".