1401215377 has 4 divisors (see below), whose sum is σ = 1416959460. Its totient is φ = 1385471296.

The previous prime is 1401215357. The next prime is 1401215437. The reversal of 1401215377 is 7735121041.

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 215032896 + 1186182481 = 14664^2 + 34441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401215377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401215357) 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, 7871908 + ... + 7872085.

It is an arithmetic number, because the mean of its divisors is an integer number (354239865).

Almost surely, 2^1401215377 is an apocalyptic number.

It is an amenable number.

1401215377 is a deficient number, since it is larger than the sum of its proper divisors (15744083).

1401215377 is an equidigital number, since it uses as much as digits as its factorization.

1401215377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15744082.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1401215377 is about 37432.8115027445. The cubic root of 1401215377 is about 1119.0125695949.

The spelling of 1401215377 in words is "one billion, four hundred one million, two hundred fifteen thousand, three hundred seventy-seven".