1401215922 has 90 divisors (see below), whose sum is σ = 3354708423. Its totient is φ = 437056128.

The previous prime is 1401215917. The next prime is 1401215927. The reversal of 1401215922 is 2295121041.

1401215922 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1401215917) and next prime (1401215927).

It can be written as a sum of positive squares in 5 ways, for example, as 1401079761 + 136161 = 37431^2 + 369^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26469.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1401215927) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 8099428 + ... + 8099600.

Almost surely, 2^1401215922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401215922

1401215922 is an abundant number, since it is smaller than the sum of its proper divisors (1953492501).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401215922 is an equidigital number, since it uses as much as digits as its factorization.

1401215922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1401215922 is about 37432.8187824535. The cubic root of 1401215922 is about 1119.0127146742.

Adding to 1401215922 its reverse (2295121041), we get a palindrome (3696336963).

The spelling of 1401215922 in words is "one billion, four hundred one million, two hundred fifteen thousand, nine hundred twenty-two".