1401531 has 8 divisors (see below), whose sum is σ = 1978704. Its totient is φ = 879360.

The previous prime is 1401529. The next prime is 1401559. The reversal of 1401531 is 1351041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1401531 - 2¹ = 1401529 is a prime.

It is a super-2 number, since 2×1401531² = 3928578287922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1401531.

It is not an unprimeable number, because it can be changed into a prime (1401511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13690 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (247338).

2^1401531 is an apocalyptic number.

1401531 is a deficient number, since it is larger than the sum of its proper divisors (577173).

1401531 is a wasteful number, since it uses less digits than its factorization.

1401531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27501.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1401531 is about 1183.8627454228. The cubic root of 1401531 is about 111.9096582278.

Adding to 1401531 its reverse (1351041), we get a palindrome (2752572).

The spelling of 1401531 in words is "one million, four hundred one thousand, five hundred thirty-one".