1402121401 has 4 divisors (see below), whose sum is σ = 1440016612. Its totient is φ = 1364226192.

The previous prime is 1402121381. The next prime is 1402121411. The reversal of 1402121401 is 1041212041.

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 894069801 + 508051600 = 29901^2 + 22540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402121401 - 2¹⁷ = 1401990329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1402121411) 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, 18947550 + ... + 18947623.

It is an arithmetic number, because the mean of its divisors is an integer number (360004153).

Almost surely, 2^1402121401 is an apocalyptic number.

It is an amenable number.

1402121401 is a deficient number, since it is larger than the sum of its proper divisors (37895211).

1402121401 is an equidigital number, since it uses as much as digits as its factorization.

1402121401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37895210.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1402121401 is about 37444.9115501693. The cubic root of 1402121401 is about 1119.2537016438.

Adding to 1402121401 its reverse (1041212041), we get a palindrome (2443333442).

The spelling of 1402121401 in words is "one billion, four hundred two million, one hundred twenty-one thousand, four hundred one".