1401542197 has 4 divisors (see below), whose sum is σ = 1528955136. Its totient is φ = 1274129260.

The previous prime is 1401542173. The next prime is 1401542279. The reversal of 1401542197 is 7912451041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7912451041 = 11 ⋅719313731.

It is a cyclic number.

It is not a de Polignac number, because 1401542197 - 2¹⁵ = 1401509429 is a prime.

It is a super-3 number, since 3×1401542197³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401542117) 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, 63706453 + ... + 63706474.

It is an arithmetic number, because the mean of its divisors is an integer number (382238784).

Almost surely, 2^1401542197 is an apocalyptic number.

It is an amenable number.

1401542197 is a deficient number, since it is larger than the sum of its proper divisors (127412939).

1401542197 is a wasteful number, since it uses less digits than its factorization.

1401542197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127412938.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1401542197 is about 37437.1766697223. The cubic root of 1401542197 is about 1119.0995624690.

The spelling of 1401542197 in words is "one billion, four hundred one million, five hundred forty-two thousand, one hundred ninety-seven".