1400252621 has 8 divisors (see below), whose sum is σ = 1423848600. Its totient is φ = 1376677440.

The previous prime is 1400252603. The next prime is 1400252647. The reversal of 1400252621 is 1262520041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61058596 + 1339194025 = 7814^2 + 36595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400252621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400252921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193415 + ... + 200523.

It is an arithmetic number, because the mean of its divisors is an integer number (177981075).

Almost surely, 2^1400252621 is an apocalyptic number.

It is an amenable number.

1400252621 is a deficient number, since it is larger than the sum of its proper divisors (23595979).

1400252621 is an equidigital number, since it uses as much as digits as its factorization.

1400252621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1400252621 is about 37419.9495055779. The cubic root of 1400252621 is about 1118.7562247773.

Adding to 1400252621 its reverse (1262520041), we get a palindrome (2662772662).

The spelling of 1400252621 in words is "one billion, four hundred million, two hundred fifty-two thousand, six hundred twenty-one".