1401230731 has 4 divisors (see below), whose sum is σ = 1401505552. Its totient is φ = 1400955912.

The previous prime is 1401230711. The next prime is 1401230767. The reversal of 1401230731 is 1370321041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1401230731 - 2⁷ = 1401230603 is a prime.

It is a super-2 number, since 2×1401230731² = 3926895122997588722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401230711) 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, 129615 + ... + 140008.

It is an arithmetic number, because the mean of its divisors is an integer number (350376388).

Almost surely, 2^1401230731 is an apocalyptic number.

1401230731 is a deficient number, since it is larger than the sum of its proper divisors (274821).

1401230731 is an equidigital number, since it uses as much as digits as its factorization.

1401230731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274820.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1401230731 is about 37433.0165896365. The cubic root of 1401230731 is about 1119.0166568220.

Adding to 1401230731 its reverse (1370321041), we get a palindrome (2771551772).

The spelling of 1401230731 in words is "one billion, four hundred one million, two hundred thirty thousand, seven hundred thirty-one".