1421670437 has 4 divisors (see below), whose sum is σ = 1550913216. Its totient is φ = 1292427660.

The previous prime is 1421670409. The next prime is 1421670443. The reversal of 1421670437 is 7340761241.

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: 7340761241 = 11 ⋅667341931.

It is a cyclic number.

It is not a de Polignac number, because 1421670437 - 2¹² = 1421666341 is a prime.

It is a super-2 number, since 2×1421670437² = 4042293662879541938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421670397 and 1421670406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421670037) 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, 64621373 + ... + 64621394.

It is an arithmetic number, because the mean of its divisors is an integer number (387728304).

Almost surely, 2^1421670437 is an apocalyptic number.

It is an amenable number.

1421670437 is a deficient number, since it is larger than the sum of its proper divisors (129242779).

1421670437 is a wasteful number, since it uses less digits than its factorization.

1421670437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129242778.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 1421670437 is about 37705.0452459614. The cubic root of 1421670437 is about 1124.4314327313.

The spelling of 1421670437 in words is "one billion, four hundred twenty-one million, six hundred seventy thousand, four hundred thirty-seven".