1401639715 has 16 divisors (see below), whose sum is σ = 2035323072. Its totient is φ = 904587264.

The previous prime is 1401639713. The next prime is 1401639719. The reversal of 1401639715 is 5179361041.

It is a happy number.

It is not a de Polignac number, because 1401639715 - 2¹ = 1401639713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401639713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177254 + ... + 1178443.

It is an arithmetic number, because the mean of its divisors is an integer number (127207692).

Almost surely, 2^1401639715 is an apocalyptic number.

1401639715 is a deficient number, since it is larger than the sum of its proper divisors (633683357).

1401639715 is a wasteful number, since it uses less digits than its factorization.

1401639715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355726.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1401639715 is about 37438.4790690007. The cubic root of 1401639715 is about 1119.1255171686.

It can be divided in two parts, 140163 and 9715, that added together give a triangular number (149878 = T₅₄₇).

The spelling of 1401639715 in words is "one billion, four hundred one million, six hundred thirty-nine thousand, seven hundred fifteen".