1402240251 has 4 divisors (see below), whose sum is σ = 1869653672. Its totient is φ = 934826832.

The previous prime is 1402240247. The next prime is 1402240331. The reversal of 1402240251 is 1520422041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1520422041 = 3 ⋅506807347.

It is not a de Polignac number, because 1402240251 - 2² = 1402240247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1402240951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233706706 + ... + 233706711.

It is an arithmetic number, because the mean of its divisors is an integer number (467413418).

Almost surely, 2^1402240251 is an apocalyptic number.

1402240251 is a deficient number, since it is larger than the sum of its proper divisors (467413421).

1402240251 is an equidigital number, since it uses as much as digits as its factorization.

1402240251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467413420.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1402240251 is about 37446.4985145474. The cubic root of 1402240251 is about 1119.2853250453.

Adding to 1402240251 its reverse (1520422041), we get a palindrome (2922662292).

The spelling of 1402240251 in words is "one billion, four hundred two million, two hundred forty thousand, two hundred fifty-one".