1401511253 has 2 divisors, whose sum is σ = 1401511254. Its totient is φ = 1401511252.

The previous prime is 1401511157. The next prime is 1401511259. The reversal of 1401511253 is 3521151041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1179441649 + 222069604 = 34343^2 + 14902^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401511253 - 2²⁰ = 1400462677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401511259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700755626 + 700755627.

It is an arithmetic number, because the mean of its divisors is an integer number (700755627).

Almost surely, 2^1401511253 is an apocalyptic number.

It is an amenable number.

1401511253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401511253 is an equidigital number, since it uses as much as digits as its factorization.

1401511253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1401511253 is about 37436.7633884127. The cubic root of 1401511253 is about 1119.0913263817.

Adding to 1401511253 its reverse (3521151041), we get a palindrome (4922662294).

The spelling of 1401511253 in words is "one billion, four hundred one million, five hundred eleven thousand, two hundred fifty-three".