1401454157 has 4 divisors (see below), whose sum is σ = 1415902236. Its totient is φ = 1387006080.

The previous prime is 1401454141. The next prime is 1401454213. The reversal of 1401454157 is 7514541041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7514541041 = 7 ⋅1073505863.

It can be written as a sum of positive squares in 2 ways, for example, as 1013403556 + 388050601 = 31834^2 + 19699^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401454157 - 2⁴ = 1401454141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401054157) 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, 7223894 + ... + 7224087.

It is an arithmetic number, because the mean of its divisors is an integer number (353975559).

Almost surely, 2^1401454157 is an apocalyptic number.

It is an amenable number.

1401454157 is a deficient number, since it is larger than the sum of its proper divisors (14448079).

1401454157 is an equidigital number, since it uses as much as digits as its factorization.

1401454157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448078.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 1401454157 is about 37436.0008147238. Note that the first 3 decimals coincide. The cubic root of 1401454157 is about 1119.0761293325.

Adding to 1401454157 its reverse (7514541041), we get a palindrome (8915995198).

The spelling of 1401454157 in words is "one billion, four hundred one million, four hundred fifty-four thousand, one hundred fifty-seven".